#37587F
Closest named color: Light Navy Blue (#2E5A88). oklch(45.3% 0.075 253.4), rgb(55, 88, 127).
Aa
White text reads best on this color (7.33:1).
About this color
#37587F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.075 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.016 away. White text reads best on it, at 7.33:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.86:1 |
| White text | 7.33:1 |
Values
| HEX | #37587F |
| RGB | rgb(55, 88, 127) |
| HSL | hsl(213, 40%, 36%) |
| OKLCH | oklch(45.3% 0.075 253.4) |
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 #37587F | 7.33:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #37587F | 2.86:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #37587F text on white | 7.33:1 | AAA | Lc 85.3 | Fine for body text |
| #37587F text on black | 2.86:1 | Fails | Lc -16.7 | 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
#CEDAE9
oklch(88.4% 0.024 254)
-
Step 300
300
#ADC3DD
oklch(80.9% 0.044 252.7)
-
Step 400
400
#82A3CC
oklch(70.6% 0.071 254.1)
-
Step 500
500
#628CBF
oklch(63% 0.09 253.9)
-
Step 600
600
#4876AB
oklch(55.7% 0.097 253)
-
Step 700
700
#3A6393
oklch(49.2% 0.09 253.4)
-
Step 800
800 (this color)
#37587F
oklch(45.3% 0.075 253.4)
-
Step 900
900
#2B4360
oklch(37.7% 0.058 253.8)
-
Step 950
950
#192738
oklch(26.9% 0.037 253.8)
#37587F 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) | #485A81 | 0.023 |
| Deuteranopia (no green cones) | #3F537E | 0.016 |
| Tritanopia (no blue cones) | #086166 | 0.066 |
| Achromatopsia (no color) | #565656 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37587F
#37587F
oklch(45.3% 0.075 253.4)
- #6F4F21
#6F4F21
oklch(45.3% 0.075 73.6)
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 #37587F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.016
- YInMn Blue #415A77 ΔE 0.020
- Dusk #4E5481 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.032
- Dusk Blue #26538D ΔE 0.035
- Denim #3B638C ΔE 0.036
- Dusty Grape #545775 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.041
Use #37587F 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.