#253D7C
Closest named color: Twilight Blue (#0A437A). oklch(37.8% 0.111 265.7), rgb(37, 61, 124).
Aa
White text reads best on this color (10.30:1).
About this color
#253D7C is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.111 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.025 away. White text reads best on it, at 10.30:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.03:1 |
| White text | 10.30:1 |
Values
| HEX | #253D7C |
| RGB | rgb(37, 61, 124) |
| HSL | hsl(223, 54%, 32%) |
| OKLCH | oklch(37.8% 0.111 265.7) |
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 #253D7C | 10.30:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #253D7C | 2.03:1 | Fails | Lc 10.3 | Not readable |
| #253D7C text on white | 10.30:1 | AAA | Lc 93.6 | Preferred for body text |
| #253D7C text on black | 2.03:1 | Fails | Lc -8.9 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A7C0F7
oklch(80.9% 0.083 265.6)
-
Step 400
400
#799DF4
oklch(70.7% 0.134 266)
-
Step 500
500
#5882EF
oklch(63% 0.17 265.9)
-
Step 600
600
#3E69DE
oklch(55.6% 0.185 265.5)
-
Step 700
700
#3156C1
oklch(49% 0.173 265.8)
-
Step 800
800
#29479C
oklch(42.7% 0.143 265.9)
-
Step 900
900 (this color)
#253D7C
oklch(37.8% 0.111 265.7)
-
Step 950
950
#162448
oklch(26.9% 0.07 265.9)
#253D7C 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) | #1B457E | 0.023 |
| Deuteranopia (no green cones) | #033D7B | 0.025 |
| Tritanopia (no blue cones) | #004C56 | 0.092 |
| Achromatopsia (no color) | #404040 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253D7C
#253D7C
oklch(37.8% 0.111 265.7)
- #543E00
#543E00
oklch(37.8% 0.077 85.9)
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 #253D7C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.025
- Cobalt #1E488F ΔE 0.041
- Marine Blue #01386A ΔE 0.046
- Light Navy #155084 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.057
- Blueberry #464196 ΔE 0.066
- Dusk Blue #26538D ΔE 0.066
- Deep Sea Blue #015482 ΔE 0.066
Use #253D7C 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.