#37506F
Closest named color: YInMn Blue (#415A77). oklch(42.5% 0.06 254.3), rgb(55, 80, 111).
Aa
White text reads best on this color (8.26:1).
About this color
#37506F is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.060 and its hue 254°. 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 8.26:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.53:1 |
| White text | 8.26:1 |
Values
| HEX | #37506F |
| RGB | rgb(55, 80, 111) |
| HSL | hsl(213, 34%, 33%) |
| OKLCH | oklch(42.5% 0.06 254.3) |
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 #37506F | 8.26:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #37506F | 2.53:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #37506F text on white | 8.26:1 | AAA | Lc 88.5 | Fine for body text |
| #37506F text on black | 2.53:1 | Fails | Lc -13.7 | 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 800.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D1DAE6
oklch(88.5% 0.019 255.5)
-
Step 300
300
#B2C2D8
oklch(80.9% 0.036 256.4)
-
Step 400
400
#89A3C4
oklch(70.7% 0.057 254.6)
-
Step 500
500
#6B8CB5
oklch(63.1% 0.073 254.2)
-
Step 600
600
#5376A1
oklch(55.7% 0.078 254.1)
-
Step 700
700
#436389
oklch(49.2% 0.072 253.4)
-
Step 800
800 (this color)
#37506F
oklch(42.5% 0.06 254.3)
-
Step 900
900
#30435A
oklch(37.7% 0.047 253.7)
-
Step 950
950
#1C2735
oklch(26.9% 0.03 254.7)
#37506F 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) | #445170 | 0.018 |
| Deuteranopia (no green cones) | #3D4C6E | 0.013 |
| Tritanopia (no blue cones) | #1F575B | 0.052 |
| Achromatopsia (no color) | #4E4E4E | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37506F
#37506F
oklch(42.5% 0.06 254.3)
- #624927
#624927
oklch(42.4% 0.06 73.5)
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 #37506F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.035
- Light Navy #155084 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.045
- Dusk #4E5481 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.047
- Dusty Grape #545775 ΔE 0.049
- Dusk Blue #26538D ΔE 0.050
Use #37506F 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.