#25436E
Closest named color: Twilight Blue (#0A437A). oklch(38.2% 0.082 257.5), rgb(37, 67, 110).
Aa
White text reads best on this color (9.96:1).
About this color
#25436E is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.082 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.027 away. White text reads best on it, at 9.96:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.10:1 |
| White text | 9.96:1 |
Values
| HEX | #25436E |
| RGB | rgb(37, 67, 110) |
| HSL | hsl(215, 50%, 29%) |
| OKLCH | oklch(38.2% 0.082 257.5) |
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 #25436E | 9.96:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #25436E | 2.10:1 | Fails | Lc 11.0 | Not readable |
| #25436E text on white | 9.96:1 | AAA | Lc 92.9 | Preferred for body text |
| #25436E text on black | 2.10:1 | Fails | Lc -9.5 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CBDAF0
oklch(88.4% 0.034 257.9)
-
Step 300
300
#A8C3E9
oklch(81% 0.061 256.9)
-
Step 400
400
#79A2DE
oklch(70.6% 0.099 257.8)
-
Step 500
500
#568AD5
oklch(63.1% 0.127 257.6)
-
Step 600
600
#3B73C2
oklch(55.7% 0.137 257.4)
-
Step 700
700
#2D60A7
oklch(49.1% 0.126 257.3)
-
Step 800
800
#264E88
oklch(42.6% 0.107 257.9)
-
Step 900
900 (this color)
#25436E
oklch(38.2% 0.082 257.5)
-
Step 950
950
#152740
oklch(27.1% 0.053 256.9)
#25436E 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) | #304670 | 0.017 |
| Deuteranopia (no green cones) | #263F6D | 0.012 |
| Tritanopia (no blue cones) | #004D53 | 0.068 |
| Achromatopsia (no color) | #434343 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25436E
#25436E
oklch(38.2% 0.082 257.5)
- #5A3C00
#5A3C00
oklch(38.1% 0.08 77.1)
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 #25436E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.037
- Marine Blue #01386A ΔE 0.047
- Light Navy #155084 ΔE 0.048
- Charcoal #264653 ΔE 0.051
- Cobalt #1E488F ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.056
Use #25436E 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.