#253F93
Closest named color: Cobalt (#1E488F). oklch(40% 0.142 266.8), rgb(37, 63, 147).
Aa
White text reads best on this color (9.49:1).
About this color
#253F93 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.142 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.025 away. White text reads best on it, at 9.49:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #253F93 |
| RGB | rgb(37, 63, 147) |
| HSL | hsl(226, 60%, 36%) |
| OKLCH | oklch(40% 0.142 266.8) |
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 #253F93 | 9.49:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #253F93 | 2.21:1 | Fails | Lc 12.4 | Not readable |
| #253F93 text on white | 9.49:1 | AAA | Lc 91.5 | Preferred for body text |
| #253F93 text on black | 2.21:1 | Fails | Lc -10.8 | 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
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#759BFF
oklch(70.6% 0.153 266.8)
-
Step 500
500
#537EFF
oklch(63.1% 0.197 266.8)
-
Step 600
600
#355EFB
oklch(55.6% 0.237 266.7)
-
Step 700
700
#294CDB
oklch(49.1% 0.221 266.7)
-
Step 800
800
#2240B1
oklch(42.8% 0.183 266.6)
-
Step 900
900 (this color)
#253F93
oklch(40% 0.142 266.8)
-
Step 950
950
#122252
oklch(27.1% 0.09 266.4)
#253F93 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) | #004B96 | 0.035 |
| Deuteranopia (no green cones) | #004191 | 0.024 |
| Tritanopia (no blue cones) | #005462 | 0.114 |
| Achromatopsia (no color) | #464646 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253F93
#253F93
oklch(40% 0.142 266.8)
- #5B4400
#5B4400
oklch(40% 0.082 86.6)
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 #253F93, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.025
- Sapphire #2138AB ΔE 0.043
- Blueberry #464196 ΔE 0.046
- Twilight Blue #0A437A ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.050
- Light Navy #155084 ΔE 0.056
- Dusk Blue #26538D ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.070
Use #253F93 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.