#37587C
Closest named color: YInMn Blue (#415A77). oklch(45.1% 0.071 251.6), rgb(55, 88, 124).
Aa
White text reads best on this color (7.37:1).
About this color
#37587C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.071 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.017 away. White text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.84:1 |
| White text | 7.37:1 |
Values
| HEX | #37587C |
| RGB | rgb(55, 88, 124) |
| HSL | hsl(211, 39%, 35%) |
| OKLCH | oklch(45.1% 0.071 251.6) |
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 #37587C | 7.37:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #37587C | 2.84:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #37587C text on white | 7.37:1 | AAA | Lc 85.5 | Fine for body text |
| #37587C text on black | 2.84:1 | Fails | Lc -16.5 | Dividers and decoration only |
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
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#AEC3DB
oklch(80.9% 0.041 251.8)
-
Step 400
400
#82A4C9
oklch(70.7% 0.066 250.9)
-
Step 500
500
#638DBB
oklch(63.1% 0.084 251.4)
-
Step 600
600
#4976A8
oklch(55.5% 0.093 252.1)
-
Step 700
700
#3A6390
oklch(49% 0.086 252)
-
Step 800
800 (this color)
#37587C
oklch(45.1% 0.071 251.6)
-
Step 900
900
#2B435E
oklch(37.6% 0.055 252.2)
-
Step 950
950
#192837
oklch(27.1% 0.035 249.2)
#37587C 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) | #495A7E | 0.025 |
| Deuteranopia (no green cones) | #41537B | 0.018 |
| Tritanopia (no blue cones) | #0E6065 | 0.061 |
| Achromatopsia (no color) | #565656 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37587C
#37587C
oklch(45.1% 0.071 251.6)
- #6E4F26
#6E4F26
oklch(45.2% 0.07 72)
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 #37587C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.017
- Light Navy Blue #2E5A88 ΔE 0.020
- Dusk #4E5481 ΔE 0.033
- Denim Blue #3B5B92 ΔE 0.037
- Denim #3B638C ΔE 0.038
- Dusk Blue #26538D ΔE 0.039
- Dusty Grape #545775 ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.041
Use #37587C 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.