#25437D
Closest named color: Twilight Blue (#0A437A). oklch(39.2% 0.105 262.1), rgb(37, 67, 125).
Aa
White text reads best on this color (9.64:1).
About this color
#25437D is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.105 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.021 away. White text reads best on it, at 9.64:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.17:1 |
| White text | 9.64:1 |
Values
| HEX | #25437D |
| RGB | rgb(37, 67, 125) |
| HSL | hsl(220, 54%, 32%) |
| OKLCH | oklch(39.2% 0.105 262.1) |
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 #25437D | 9.64:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #25437D | 2.17:1 | Fails | Lc 11.9 | Not readable |
| #25437D text on white | 9.64:1 | AAA | Lc 92.1 | Preferred for body text |
| #25437D text on black | 2.17:1 | Fails | Lc -10.3 | 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 900.
-
Step 50
50
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A5C1F4
oklch(80.8% 0.079 262.3)
-
Step 400
400
#75A0EF
oklch(70.8% 0.126 261.9)
-
Step 500
500
#5285E9
oklch(63% 0.16 262.4)
-
Step 600
600
#366DD8
oklch(55.7% 0.175 262)
-
Step 700
700
#295ABB
oklch(49.1% 0.162 262.1)
-
Step 800
800
#234A97
oklch(42.7% 0.134 262.1)
-
Step 900
900 (this color)
#25437D
oklch(39.2% 0.105 262.1)
-
Step 950
950
#142546
oklch(26.9% 0.066 262.3)
#25437D 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) | #27497F | 0.018 |
| Deuteranopia (no green cones) | #17417C | 0.015 |
| Tritanopia (no blue cones) | #00505A | 0.084 |
| Achromatopsia (no color) | #454545 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25437D
#25437D
oklch(39.2% 0.105 262.1)
- #5B4000
#5B4000
oklch(39.1% 0.081 81.5)
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 #25437D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.021
- Cobalt #1E488F ΔE 0.031
- Light Navy #155084 ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.050
- Dusk Blue #26538D ΔE 0.051
- Marine Blue #01386A ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.061
Use #25437D 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.