#616BCC
Closest named color: Dark Periwinkle (#665FD1). oklch(56.7% 0.148 276.2), rgb(97, 107, 204).
Aa
White text reads best on this color (4.68:1).
About this color
#616BCC is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.148 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.032 away. White text reads best on it, at 4.68:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.48:1 |
| White text | 4.68:1 |
Values
| HEX | #616BCC |
| RGB | rgb(97, 107, 204) |
| HSL | hsl(234, 51%, 59%) |
| OKLCH | oklch(56.7% 0.148 276.2) |
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 #616BCC | 4.68:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #616BCC | 4.48:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #616BCC text on white | 4.68:1 | AA | Lc 72.3 | Content text, not long reading |
| #616BCC text on black | 4.48:1 | AA large text | Lc -29.4 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F2
oklch(88.6% 0.036 275.3)
-
Step 300
300
#B4BEEC
oklch(80.9% 0.066 275.3)
-
Step 400
400
#8F9BE3
oklch(70.8% 0.106 276.1)
-
Step 500
500
#7480DB
oklch(63.1% 0.137 276.1)
-
Step 600
600 (this color)
#616BCC
oklch(56.7% 0.148 276.2)
-
Step 700
700
#4E56AD
oklch(49.2% 0.137 276.2)
-
Step 800
800
#40468C
oklch(42.6% 0.114 276.7)
-
Step 900
900
#363C70
oklch(37.8% 0.088 276.3)
-
Step 950
950
#1F2342
oklch(26.9% 0.058 276.3)
#616BCC 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) | #3F78D0 | 0.046 |
| Deuteranopia (no green cones) | #3370CA | 0.049 |
| Tritanopia (no blue cones) | #318092 | 0.130 |
| Achromatopsia (no color) | #747474 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #616BCC
#616BCC
oklch(56.7% 0.148 276.2)
- #8B7500
#8B7500
oklch(56.6% 0.116 95.9)
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 #616BCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.032
- Slate Blue #6A5ACD ΔE 0.042
- Light Indigo #6D5ACF ΔE 0.044
- Iris #6258C4 ΔE 0.047
- Royal Blue #4169E1 ΔE 0.050
- Windows Blue #3778BF ΔE 0.059
- French Blue #436BAD ΔE 0.063
- Medium Slate Blue #7B68EE ΔE 0.065
Use #616BCC 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.