#25459C
Closest named color: Cobalt (#1E488F). oklch(42% 0.147 265.3), rgb(37, 69, 156).
Aa
White text reads best on this color (8.71:1).
About this color
#25459C is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.147 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.024 away. White text reads best on it, at 8.71:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.40:1 |
| White text | 8.71:1 |
Values
| HEX | #25459C |
| RGB | rgb(37, 69, 156) |
| HSL | hsl(224, 62%, 38%) |
| OKLCH | oklch(42% 0.147 265.3) |
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 #25459C | 8.71:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #25459C | 2.40:1 | Fails | Lc 14.6 | Not readable |
| #25459C text on white | 8.71:1 | AAA | Lc 89.4 | Fine for body text |
| #25459C text on black | 2.40:1 | Fails | Lc -12.8 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9FA
oklch(88.5% 0.048 266)
-
Step 300
300
#A6C0F9
oklch(80.9% 0.086 265.5)
-
Step 400
400
#779DF6
oklch(70.6% 0.138 265.5)
-
Step 500
500
#5582F2
oklch(63.1% 0.175 265.3)
-
Step 600
600
#3B68E1
oklch(55.5% 0.191 265.2)
-
Step 700
700
#2E56C4
oklch(49.2% 0.178 265.2)
-
Step 800
800 (this color)
#25459C
oklch(42% 0.147 265.3)
-
Step 900
900
#233D7E
oklch(37.8% 0.115 265)
-
Step 950
950
#15244A
oklch(27% 0.073 265.6)
#25459C 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) | #00519F | 0.034 |
| Deuteranopia (no green cones) | #00469A | 0.022 |
| Tritanopia (no blue cones) | #005A69 | 0.116 |
| Achromatopsia (no color) | #4B4B4B | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25459C
#25459C
oklch(42% 0.147 265.3)
- #624900
#624900
oklch(42.1% 0.086 86)
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 #25459C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.024
- Sapphire #2138AB ΔE 0.040
- Blueberry #464196 ΔE 0.043
- Dusk Blue #26538D ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.054
- Light Navy #155084 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.066
Use #25459C 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.