#616BBF
Closest named color: Dark Periwinkle (#665FD1). oklch(55.9% 0.13 276.2), rgb(97, 107, 191).
Aa
White text reads best on this color (4.81:1).
About this color
#616BBF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.130 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.044 away. White text reads best on it, at 4.81:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.36:1 |
| White text | 4.81:1 |
Values
| HEX | #616BBF |
| RGB | rgb(97, 107, 191) |
| HSL | hsl(234, 42%, 56%) |
| OKLCH | oklch(55.9% 0.13 276.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #616BBF | 4.81:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #616BBF | 4.36:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #616BBF text on white | 4.81:1 | AA | Lc 73.2 | Content text, not long reading |
| #616BBF text on black | 4.36:1 | AA large text | Lc -28.5 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D3D8EF
oklch(88.5% 0.032 276)
-
Step 300
300
#B6BEE7
oklch(80.9% 0.059 276.4)
-
Step 400
400
#919CDB
oklch(70.8% 0.093 276.1)
-
Step 500
500
#7782D1
oklch(63.2% 0.119 276.4)
-
Step 600
600 (this color)
#616BBF
oklch(55.9% 0.13 276.2)
-
Step 700
700
#5058A4
oklch(49.2% 0.121 276.5)
-
Step 800
800
#414885
oklch(42.7% 0.101 276.3)
-
Step 900
900
#373D6A
oklch(37.7% 0.077 276.3)
-
Step 950
950
#20243E
oklch(27% 0.049 276)
#616BBF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4976C2 | 0.037 |
| Deuteranopia (no green cones) | #406EBD | 0.039 |
| Tritanopia (no blue cones) | #3C7D8C | 0.114 |
| Achromatopsia (no color) | #727272 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #616BBF
#616BBF
oklch(55.9% 0.13 276.2)
- #887300
#887300
oklch(55.9% 0.115 96.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #616BBF, closest first.
No curated palette has a color within ΔE 0.04 of #616BBF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.044
- French Blue #436BAD ΔE 0.048
- Iris #6258C4 ΔE 0.050
- Slate Blue #6A5ACD ΔE 0.051
- Windows Blue #3778BF ΔE 0.053
- Light Indigo #6D5ACF ΔE 0.053
- Flat Blue #3C73A8 ΔE 0.062
- Royal Blue #4169E1 ΔE 0.064
Use #616BBF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.