#616CBB
Closest named color: French Blue (#436BAD). oklch(55.9% 0.122 275.7), rgb(97, 108, 187).
Aa
White text reads best on this color (4.80:1).
About this color
#616CBB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.122 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.044 away. White text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.37:1 |
| White text | 4.80:1 |
Values
| HEX | #616CBB |
| RGB | rgb(97, 108, 187) |
| HSL | hsl(233, 40%, 56%) |
| OKLCH | oklch(55.9% 0.122 275.7) |
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 #616CBB | 4.80:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #616CBB | 4.37:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #616CBB text on white | 4.80:1 | AA | Lc 73.2 | Content text, not long reading |
| #616CBB text on black | 4.37:1 | 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
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D3D8EE
oklch(88.5% 0.031 275.6)
-
Step 300
300
#B6BEE5
oklch(80.8% 0.056 276)
-
Step 400
400
#919CD8
oklch(70.7% 0.089 275.9)
-
Step 500
500
#7783CD
oklch(63.2% 0.112 275.7)
-
Step 600
600 (this color)
#616CBB
oklch(55.9% 0.122 275.7)
-
Step 700
700
#5059A0
oklch(49.1% 0.113 276)
-
Step 800
800
#414982
oklch(42.7% 0.095 275.6)
-
Step 900
900
#373D68
oklch(37.6% 0.074 276.2)
-
Step 950
950
#20243D
oklch(26.9% 0.047 275.9)
#616CBB 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) | #4D76BE | 0.033 |
| Deuteranopia (no green cones) | #456FB9 | 0.034 |
| Tritanopia (no blue cones) | #3F7D8A | 0.109 |
| Achromatopsia (no color) | #727272 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #616CBB
#616CBB
oklch(55.9% 0.122 275.7)
- #897300
#897300
oklch(56% 0.115 95.7)
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 #616CBB, closest first.
No curated palette has a color within ΔE 0.04 of #616CBB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.044
- Windows Blue #3778BF ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.051
- Iris #6258C4 ΔE 0.055
- Slate Blue #6A5ACD ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.057
- Light Indigo #6D5ACF ΔE 0.059
- Mid Blue #276AB3 ΔE 0.064
Use #616CBB 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.