#25418A
Closest named color: Cobalt (#1E488F). oklch(39.7% 0.126 265.3), rgb(37, 65, 138).
Aa
White text reads best on this color (9.53:1).
About this color
#25418A is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.126 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 9.53:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.20:1 |
| White text | 9.53:1 |
Values
| HEX | #25418A |
| RGB | rgb(37, 65, 138) |
| HSL | hsl(223, 58%, 34%) |
| OKLCH | oklch(39.7% 0.126 265.3) |
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 #25418A | 9.53:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #25418A | 2.20:1 | Fails | Lc 12.2 | Not readable |
| #25418A text on white | 9.53:1 | AAA | Lc 91.7 | Preferred for body text |
| #25418A text on black | 2.20:1 | Fails | Lc -10.7 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8D9FD
oklch(88.4% 0.053 265.3)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#729CFF
oklch(70.6% 0.153 265.4)
-
Step 500
500
#4F80FD
oklch(63.1% 0.194 265.2)
-
Step 600
600
#3565EC
oklch(55.6% 0.211 265.2)
-
Step 700
700
#2953CE
oklch(49.2% 0.196 265.2)
-
Step 800
800
#2245A6
oklch(42.8% 0.162 265)
-
Step 900
900 (this color)
#25418A
oklch(39.7% 0.126 265.3)
-
Step 950
950
#13234D
oklch(26.9% 0.08 265.6)
#25418A 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) | #134A8D | 0.026 |
| Deuteranopia (no green cones) | #004189 | 0.024 |
| Tritanopia (no blue cones) | #00525F | 0.100 |
| Achromatopsia (no color) | #454545 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25418A
#25418A
oklch(39.7% 0.126 265.3)
- #5B4300
#5B4300
oklch(39.8% 0.082 85.3)
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 #25418A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Twilight Blue #0A437A ΔE 0.035
- Light Navy #155084 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.048
- Blueberry #464196 ΔE 0.049
- Dusk Blue #26538D ΔE 0.051
- Sapphire #2138AB ΔE 0.059
- Deep Sea Blue #015482 ΔE 0.059
Use #25418A 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.