#25537E
Closest named color: Deep Sea Blue (#015482). oklch(43.2% 0.088 249.2), rgb(37, 83, 126).
Aa
White text reads best on this color (8.02:1).
About this color
#25537E is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.088 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.019 away. White text reads best on it, at 8.02:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.61:1 |
| White text | 8.02:1 |
Values
| HEX | #25537E |
| RGB | rgb(37, 83, 126) |
| HSL | hsl(209, 55%, 32%) |
| OKLCH | oklch(43.2% 0.088 249.2) |
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 #25537E | 8.02:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #25537E | 2.61:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #25537E text on white | 8.02:1 | AAA | Lc 87.6 | Fine for body text |
| #25537E text on black | 2.61:1 | Fails | Lc -14.6 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A8C4E1
oklch(80.9% 0.051 249.4)
-
Step 400
400
#78A5D2
oklch(70.7% 0.082 249.1)
-
Step 500
500
#548EC6
oklch(63.1% 0.105 249)
-
Step 600
600
#3777B3
oklch(55.6% 0.114 249.3)
-
Step 700
700
#29649A
oklch(49.1% 0.106 249.2)
-
Step 800
800 (this color)
#25537E
oklch(43.2% 0.088 249.2)
-
Step 900
900
#224464
oklch(37.7% 0.068 248.8)
-
Step 950
950
#15283B
oklch(27.1% 0.044 249.7)
#25537E 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) | #405580 | 0.031 |
| Deuteranopia (no green cones) | #334D7D | 0.021 |
| Tritanopia (no blue cones) | #005D62 | 0.067 |
| Achromatopsia (no color) | #505050 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25537E
#25537E
oklch(43.2% 0.088 249.2)
- #6F460D
#6F460D
oklch(43.2% 0.088 68.8)
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 #25537E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.019
- Light Navy #155084 ΔE 0.019
- Dusk Blue #26538D ΔE 0.025
- Light Navy Blue #2E5A88 ΔE 0.027
- YInMn Blue #415A77 ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.047
- Cobalt #1E488F ΔE 0.048
- Dusk #4E5481 ΔE 0.051
Use #25537E 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.