#25439F
Closest named color: Cobalt (#1E488F). oklch(41.9% 0.154 266.1), rgb(37, 67, 159).
Aa
White text reads best on this color (8.81:1).
About this color
#25439F is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.154 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.031 away. White text reads best on it, at 8.81:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.38:1 |
| White text | 8.81:1 |
Values
| HEX | #25439F |
| RGB | rgb(37, 67, 159) |
| HSL | hsl(225, 62%, 38%) |
| OKLCH | oklch(41.9% 0.154 266.1) |
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 #25439F | 8.81:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #25439F | 2.38:1 | Fails | Lc 14.3 | Not readable |
| #25439F text on white | 8.81:1 | AAA | Lc 89.7 | Fine for body text |
| #25439F text on black | 2.38:1 | Fails | Lc -12.6 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A6C0FC
oklch(81% 0.09 266.3)
-
Step 400
400
#769CFA
oklch(70.6% 0.144 266.2)
-
Step 500
500
#5580F7
oklch(63% 0.184 266.3)
-
Step 600
600
#3C66E6
oklch(55.6% 0.2 266.2)
-
Step 700
700
#2F54C8
oklch(49.1% 0.185 266.1)
-
Step 800
800 (this color)
#25439F
oklch(41.9% 0.154 266.1)
-
Step 900
900
#233C80
oklch(37.7% 0.119 265.7)
-
Step 950
950
#15244B
oklch(27.1% 0.075 265.8)
#25439F 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) | #0050A2 | 0.035 |
| Deuteranopia (no green cones) | #00459D | 0.022 |
| Tritanopia (no blue cones) | #005A6A | 0.122 |
| Achromatopsia (no color) | #4A4A4A | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25439F
#25439F
oklch(41.9% 0.154 266.1)
- #614900
#614900
oklch(41.9% 0.086 87)
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 #25439F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.031
- Sapphire #2138AB ΔE 0.033
- Blueberry #464196 ΔE 0.044
- Dusk Blue #26538D ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.056
- Light Navy #155084 ΔE 0.061
- Blue Blue #2242C7 ΔE 0.064
- Twilight Blue #0A437A ΔE 0.066
Use #25439F 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.