#37456D
Closest named color: Dark Grey Blue (#29465B). oklch(39.7% 0.07 268.4), rgb(55, 69, 109).
Aa
White text reads best on this color (9.39:1).
About this color
#37456D is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.070 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.038 away. White text reads best on it, at 9.39:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #37456D |
| RGB | rgb(55, 69, 109) |
| HSL | hsl(224, 33%, 32%) |
| OKLCH | oklch(39.7% 0.07 268.4) |
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 #37456D | 9.39:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #37456D | 2.23:1 | Fails | Lc 12.3 | Not readable |
| #37456D text on white | 9.39:1 | AAA | Lc 91.6 | Preferred for body text |
| #37456D text on black | 2.23:1 | Fails | Lc -10.7 | Not readable |
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 900.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D1D9ED
oklch(88.5% 0.029 268.3)
-
Step 300
300
#B2C0E4
oklch(80.9% 0.053 268.5)
-
Step 400
400
#8A9FD6
oklch(70.7% 0.084 268.1)
-
Step 500
500
#6E86CB
oklch(63.1% 0.108 268.6)
-
Step 600
600
#566FB8
oklch(55.6% 0.117 268.2)
-
Step 700
700
#475C9E
oklch(49% 0.109 268.8)
-
Step 800
800
#3A4C80
oklch(42.7% 0.089 268.1)
-
Step 900
900 (this color)
#37456D
oklch(39.7% 0.07 268.4)
-
Step 950
950
#1D253C
oklch(26.9% 0.045 268.7)
#37456D 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) | #36496F | 0.012 |
| Deuteranopia (no green cones) | #31446C | 0.009 |
| Tritanopia (no blue cones) | #224D54 | 0.062 |
| Achromatopsia (no color) | #464646 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37456D
#37456D
oklch(39.7% 0.07 268.4)
- #574512
#574512
oklch(39.9% 0.071 88.7)
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 #37456D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.038
- Twilight Blue #0A437A ΔE 0.048
- Light Navy #155084 ΔE 0.051
- Charcoal #264653 ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.058
- Cobalt #1E488F ΔE 0.060
- Dusk Blue #26538D ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.064
Use #37456D 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.