#25458A
Closest named color: Cobalt (#1E488F). oklch(40.6% 0.121 263.3), rgb(37, 69, 138).
Aa
White text reads best on this color (9.14:1).
About this color
#25458A is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.121 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.012 away. White text reads best on it, at 9.14:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.29:1 |
| White text | 9.14:1 |
Values
| HEX | #25458A |
| RGB | rgb(37, 69, 138) |
| HSL | hsl(221, 58%, 34%) |
| OKLCH | oklch(40.6% 0.121 263.3) |
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 #25458A | 9.14:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #25458A | 2.29:1 | Fails | Lc 13.3 | Not readable |
| #25458A text on white | 9.14:1 | AAA | Lc 90.7 | Preferred for body text |
| #25458A text on black | 2.29:1 | Fails | Lc -11.6 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF4
oklch(88.6% 0.039 262.9)
-
Step 300
300
#A9C1EF
oklch(80.9% 0.07 263.3)
-
Step 400
400
#7BA0E7
oklch(70.7% 0.112 262.8)
-
Step 500
500
#5A86E0
oklch(63.1% 0.144 263.2)
-
Step 600
600
#416ECE
oklch(55.7% 0.157 263.3)
-
Step 700
700
#335BB3
oklch(49.1% 0.147 263.5)
-
Step 800
800 (this color)
#25458A
oklch(40.6% 0.121 263.3)
-
Step 900
900
#263F73
oklch(37.6% 0.094 263.2)
-
Step 950
950
#172543
oklch(26.9% 0.059 264)
#25458A 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) | #1F4D8D | 0.022 |
| Deuteranopia (no green cones) | #004489 | 0.024 |
| Tritanopia (no blue cones) | #005561 | 0.096 |
| Achromatopsia (no color) | #484848 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25458A
#25458A
oklch(40.6% 0.121 263.3)
- #5F4400
#5F4400
oklch(40.6% 0.083 82.8)
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 #25458A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.012
- Light Navy #155084 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.035
- Dusk Blue #26538D ΔE 0.040
- Blueberry #464196 ΔE 0.048
- Dark Slate Blue #483D8B ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.049
- Sapphire #2138AB ΔE 0.064
Use #25458A 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.