#37536D
Closest named color: YInMn Blue (#415A77). oklch(43.1% 0.055 247.4), rgb(55, 83, 109).
Aa
White text reads best on this color (8.01:1).
About this color
#37536D is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.055 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.029 away. White text reads best on it, at 8.01:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.62:1 |
| White text | 8.01:1 |
Values
| HEX | #37536D |
| RGB | rgb(55, 83, 109) |
| HSL | hsl(209, 33%, 32%) |
| OKLCH | oklch(43.1% 0.055 247.4) |
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 #37536D | 8.01:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #37536D | 2.62:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #37536D text on white | 8.01:1 | AAA | Lc 87.7 | Fine for body text |
| #37536D text on black | 2.62:1 | Fails | Lc -14.4 | 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
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DAE5
oklch(88.4% 0.019 250.6)
-
Step 300
300
#B1C3D5
oklch(80.9% 0.032 248.2)
-
Step 400
400
#87A4C0
oklch(70.7% 0.052 247.7)
-
Step 500
500
#698DB0
oklch(63% 0.067 248.2)
-
Step 600
600
#50779B
oklch(55.5% 0.071 247.3)
-
Step 700
700
#416485
oklch(49.1% 0.067 247.9)
-
Step 800
800 (this color)
#37536D
oklch(43.1% 0.055 247.4)
-
Step 900
900
#2F4457
oklch(37.7% 0.042 246.5)
-
Step 950
950
#1C2833
oklch(27.1% 0.026 246.6)
#37536D 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) | #48536E | 0.023 |
| Deuteranopia (no green cones) | #414E6C | 0.019 |
| Tritanopia (no blue cones) | #1F595C | 0.046 |
| Achromatopsia (no color) | #505050 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37536D
#37536D
oklch(43.1% 0.055 247.4)
- #654A2E
#654A2E
oklch(43.1% 0.056 66.5)
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 #37536D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.045
- Dusty Grape #545775 ΔE 0.046
- Dusk #4E5481 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.048
- Petrol #005F6A ΔE 0.050
- Light Navy #155084 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.051
Use #37536D 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.