#252E9D
Closest named color: Sapphire (#2138AB). oklch(37.8% 0.176 271), rgb(37, 46, 157).
Aa
White text reads best on this color (10.73:1).
About this color
#252E9D is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.176 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.032 away. White text reads best on it, at 10.73:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 1.95:1 |
| White text | 10.73:1 |
Values
| HEX | #252E9D |
| RGB | rgb(37, 46, 157) |
| HSL | hsl(236, 62%, 38%) |
| OKLCH | oklch(37.8% 0.176 271) |
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 #252E9D | 10.73:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #252E9D | 1.95:1 | Fails | Lc 9.9 | Not readable |
| #252E9D text on white | 10.73:1 | AAA | Lc 94.1 | Preferred for body text |
| #252E9D text on black | 1.95:1 | Fails | Lc -8.5 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#607BFF
oklch(63.2% 0.197 271)
-
Step 600
600
#4658FF
oklch(55.6% 0.245 271)
-
Step 700
700
#3733F7
oklch(49% 0.273 271)
-
Step 800
800
#2C2EC7
oklch(42.6% 0.226 271)
-
Step 900
900 (this color)
#252E9D
oklch(37.8% 0.176 271)
-
Step 950
950
#151D5C
oklch(27.1% 0.112 271.1)
#252E9D 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) | #0044A0 | 0.051 |
| Deuteranopia (no green cones) | #00389B | 0.030 |
| Tritanopia (no blue cones) | #004D62 | 0.138 |
| Achromatopsia (no color) | #3E3E3E | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252E9D
#252E9D
oklch(37.8% 0.176 271)
- #514000
#514000
oklch(37.9% 0.077 91.7)
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 #252E9D, closest first.
No curated palette has a color within ΔE 0.04 of #252E9D.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.032
- Indigo Blue #3A18B1 ΔE 0.049
- Royal #0C1793 ΔE 0.059
- Ultramarine #2000B1 ΔE 0.059
- Cobalt Blue #030AA7 ΔE 0.067
- Imperial Purple #480CA8 ΔE 0.067
- Cobalt #1E488F ΔE 0.067
- Blueberry #464196 ΔE 0.071
Use #252E9D 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.