#37487B
Closest named color: Light Navy (#155084). oklch(41.3% 0.088 268.5), rgb(55, 72, 123).
Aa
White text reads best on this color (8.84:1).
About this color
#37487B is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.088 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.036 away. White text reads best on it, at 8.84:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.37:1 |
| White text | 8.84:1 |
Values
| HEX | #37487B |
| RGB | rgb(55, 72, 123) |
| HSL | hsl(225, 38%, 35%) |
| OKLCH | oklch(41.3% 0.088 268.5) |
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 #37487B | 8.84:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #37487B | 2.37:1 | Fails | Lc 13.9 | Not readable |
| #37487B text on white | 8.84:1 | AAA | Lc 90.1 | Preferred for body text |
| #37487B text on black | 2.37:1 | Fails | Lc -12.2 | 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
#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
#B2C0E3
oklch(80.9% 0.052 268)
-
Step 400
400
#8B9FD5
oklch(70.7% 0.083 268.6)
-
Step 500
500
#6F86CA
oklch(63.1% 0.106 269)
-
Step 600
600
#576FB6
oklch(55.6% 0.114 268.4)
-
Step 700
700
#475D9D
oklch(49.2% 0.106 268)
-
Step 800
800 (this color)
#37487B
oklch(41.3% 0.088 268.5)
-
Step 900
900
#324066
oklch(37.8% 0.068 267.7)
-
Step 950
950
#1D253C
oklch(26.9% 0.045 268.7)
#37487B 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) | #334D7D | 0.015 |
| Deuteranopia (no green cones) | #2B477A | 0.016 |
| Tritanopia (no blue cones) | #15535B | 0.079 |
| Achromatopsia (no color) | #4A4A4A | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37487B
#37487B
oklch(41.3% 0.088 268.5)
- #5E4800
#5E4800
oklch(41.3% 0.084 88.6)
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 #37487B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.036
- Dusk Blue #26538D ΔE 0.041
- Cobalt #1E488F ΔE 0.041
- Twilight Blue #0A437A ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.047
- Dark Slate Blue #483D8B ΔE 0.049
- Twilight #4E518B ΔE 0.050
- Dusk #4E5481 ΔE 0.051
Use #37487B 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.