#253E85
Closest named color: Cobalt (#1E488F). oklch(38.7% 0.123 266.1), rgb(37, 62, 133).
Aa
White text reads best on this color (9.96:1).
About this color
#253E85 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.123 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.030 away. White text reads best on it, at 9.96:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.10:1 |
| White text | 9.96:1 |
Values
| HEX | #253E85 |
| RGB | rgb(37, 62, 133) |
| HSL | hsl(224, 56%, 33%) |
| OKLCH | oklch(38.7% 0.123 266.1) |
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 #253E85 | 9.96:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #253E85 | 2.10:1 | Fails | Lc 11.2 | Not readable |
| #253E85 text on white | 9.96:1 | AAA | Lc 92.8 | Preferred for body text |
| #253E85 text on black | 2.10:1 | Fails | Lc -9.7 | 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
#F1F5FE
oklch(97% 0.013 266.7)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C9D9FC
oklch(88.5% 0.051 265.9)
-
Step 300
300
#A5C0FD
oklch(81% 0.092 265.9)
-
Step 400
400
#759CFC
oklch(70.6% 0.147 266)
-
Step 500
500
#5380FA
oklch(63.1% 0.189 265.9)
-
Step 600
600
#3B65E9
oklch(55.6% 0.205 266.3)
-
Step 700
700
#2E53CB
oklch(49.2% 0.191 266.2)
-
Step 800
800
#2645A4
oklch(42.8% 0.158 266.1)
-
Step 900
900 (this color)
#253E85
oklch(38.7% 0.123 266.1)
-
Step 950
950
#14234C
oklch(26.9% 0.078 266.1)
#253E85 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) | #114788 | 0.027 |
| Deuteranopia (no green cones) | #003E84 | 0.026 |
| Tritanopia (no blue cones) | #004F5B | 0.100 |
| Achromatopsia (no color) | #434343 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253E85
#253E85
oklch(38.7% 0.123 266.1)
- #574000
#574000
oklch(38.6% 0.079 85.4)
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 #253E85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.030
- Twilight Blue #0A437A ΔE 0.031
- Dark Slate Blue #483D8B ΔE 0.051
- Light Navy #155084 ΔE 0.052
- Blueberry #464196 ΔE 0.056
- Marine Blue #01386A ΔE 0.059
- Dusk Blue #26538D ΔE 0.060
- Sapphire #2138AB ΔE 0.065
Use #253E85 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.