#25447B
Closest named color: Twilight Blue (#0A437A). oklch(39.3% 0.1 261), rgb(37, 68, 123).
Aa
White text reads best on this color (9.58:1).
About this color
#25447B is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.100 and its hue 261°. 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 9.58:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.19:1 |
| White text | 9.58:1 |
Values
| HEX | #25447B |
| RGB | rgb(37, 68, 123) |
| HSL | hsl(218, 54%, 31%) |
| OKLCH | oklch(39.3% 0.1 261) |
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 #25447B | 9.58:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #25447B | 2.19:1 | Fails | Lc 12.0 | Not readable |
| #25447B text on white | 9.58:1 | AAA | Lc 91.9 | Preferred for body text |
| #25447B text on black | 2.19:1 | Fails | Lc -10.5 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A5C2F2
oklch(80.9% 0.075 260.4)
-
Step 400
400
#75A0EC
oklch(70.6% 0.122 261.3)
-
Step 500
500
#5187E5
oklch(63.1% 0.153 260.7)
-
Step 600
600
#366ED3
oklch(55.5% 0.167 261.1)
-
Step 700
700
#285CB7
oklch(49.2% 0.155 260.7)
-
Step 800
800
#224B94
oklch(42.6% 0.129 260.9)
-
Step 900
900 (this color)
#25447B
oklch(39.3% 0.1 261)
-
Step 950
950
#142645
oklch(27.1% 0.063 260.6)
#25447B 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) | #2A497D | 0.017 |
| Deuteranopia (no green cones) | #1C417A | 0.014 |
| Tritanopia (no blue cones) | #005159 | 0.083 |
| Achromatopsia (no color) | #454545 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25447B
#25447B
oklch(39.3% 0.1 261)
- #5C4000
#5C4000
oklch(39.3% 0.081 80.5)
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 #25447B, 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 0.034
- Light Navy #155084 ΔE 0.036
- Deep Sea Blue #015482 ΔE 0.047
- Dusk Blue #26538D ΔE 0.050
- Marine Blue #01386A ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.058
Use #25447B 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.