#253C87
Closest named color: Cobalt (#1E488F). oklch(38.4% 0.129 267.2), rgb(37, 60, 135).
Aa
White text reads best on this color (10.12:1).
About this color
#253C87 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.129 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.034 away. White text reads best on it, at 10.12:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.07:1 |
| White text | 10.12:1 |
Values
| HEX | #253C87 |
| RGB | rgb(37, 60, 135) |
| HSL | hsl(226, 57%, 34%) |
| OKLCH | oklch(38.4% 0.129 267.2) |
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 #253C87 | 10.12:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #253C87 | 2.07:1 | Fails | Lc 10.8 | Not readable |
| #253C87 text on white | 10.12:1 | AAA | Lc 93.1 | Preferred for body text |
| #253C87 text on black | 2.07:1 | Fails | Lc -9.4 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FE
oklch(88.5% 0.054 266.8)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#769BFF
oklch(70.7% 0.152 267.2)
-
Step 500
500
#547EFF
oklch(63.1% 0.197 267)
-
Step 600
600
#3C63EE
oklch(55.6% 0.214 267)
-
Step 700
700
#2F50CF
oklch(49% 0.199 267.2)
-
Step 800
800
#2743A8
oklch(42.7% 0.166 267.1)
-
Step 900
900 (this color)
#253C87
oklch(38.4% 0.129 267.2)
-
Step 950
950
#15234E
oklch(27.1% 0.081 267.2)
#253C87 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) | #02468A | 0.032 |
| Deuteranopia (no green cones) | #003D85 | 0.026 |
| Tritanopia (no blue cones) | #004E5B | 0.104 |
| Achromatopsia (no color) | #424242 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253C87
#253C87
oklch(38.4% 0.129 267.2)
- #554000
#554000
oklch(38.4% 0.078 87.5)
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 #253C87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.034
- Twilight Blue #0A437A ΔE 0.036
- Dark Slate Blue #483D8B ΔE 0.051
- Blueberry #464196 ΔE 0.056
- Light Navy #155084 ΔE 0.057
- Marine Blue #01386A ΔE 0.060
- Sapphire #2138AB ΔE 0.060
- Dusk Blue #26538D ΔE 0.065
Use #253C87 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.