#37516B
Closest named color: YInMn Blue (#415A77). oklch(42.5% 0.054 249.2), rgb(55, 81, 107).
Aa
White text reads best on this color (8.22:1).
About this color
#37516B is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.054 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.035 away. White text reads best on it, at 8.22:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #37516B |
| RGB | rgb(55, 81, 107) |
| HSL | hsl(210, 32%, 32%) |
| OKLCH | oklch(42.5% 0.054 249.2) |
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 #37516B | 8.22:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #37516B | 2.55:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #37516B text on white | 8.22:1 | AAA | Lc 88.4 | Fine for body text |
| #37516B text on black | 2.55:1 | Fails | Lc -13.8 | 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 800.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D1DAE4
oklch(88.4% 0.017 250.9)
-
Step 300
300
#B2C3D5
oklch(81% 0.032 249.7)
-
Step 400
400
#89A4BF
oklch(70.8% 0.05 248.5)
-
Step 500
500
#6B8DAF
oklch(63.1% 0.064 248.9)
-
Step 600
600
#53779B
oklch(55.7% 0.07 249.2)
-
Step 700
700
#436484
oklch(49.2% 0.064 248.5)
-
Step 800
800 (this color)
#37516B
oklch(42.5% 0.054 249.2)
-
Step 900
900
#304457
oklch(37.8% 0.041 247.7)
-
Step 950
950
#1C2833
oklch(27.1% 0.026 246.6)
#37516B 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) | #47526C | 0.022 |
| Deuteranopia (no green cones) | #404C6A | 0.018 |
| Tritanopia (no blue cones) | #21575A | 0.046 |
| Achromatopsia (no color) | #4F4F4F | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37516B
#37516B
oklch(42.5% 0.054 249.2)
- #62492D
#62492D
oklch(42.5% 0.054 68.7)
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 #37516B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.049
- Dusty Grape #545775 ΔE 0.049
- Dusk #4E5481 ΔE 0.051
- Light Navy #155084 ΔE 0.051
Use #37516B 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.