#253973
Closest named color: Twilight Blue (#0A437A). oklch(36.2% 0.103 266.9), rgb(37, 57, 115).
Aa
White text reads best on this color (10.98:1).
About this color
#253973 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.103 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.033 away. White text reads best on it, at 10.98:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.91:1 |
| White text | 10.98:1 |
Values
| HEX | #253973 |
| RGB | rgb(37, 57, 115) |
| HSL | hsl(225, 51%, 30%) |
| OKLCH | oklch(36.2% 0.103 266.9) |
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 #253973 | 10.98:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #253973 | 1.91:1 | Fails | Lc 8.7 | Not readable |
| #253973 text on white | 10.98:1 | AAA | Lc 95.2 | Preferred for body text |
| #253973 text on black | 1.91:1 | Fails | Lc -7.5 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#AAC0F3
oklch(80.9% 0.076 266.5)
-
Step 400
400
#7E9DEE
oklch(70.6% 0.124 267.3)
-
Step 500
500
#5E83E8
oklch(63.1% 0.157 266.8)
-
Step 600
600
#466AD6
oklch(55.6% 0.171 266.9)
-
Step 700
700
#3858BA
oklch(49.2% 0.159 266.8)
-
Step 800
800
#2E4896
oklch(42.6% 0.132 266.8)
-
Step 900
900 (this color)
#253973
oklch(36.2% 0.103 266.9)
-
Step 950
950
#182446
oklch(26.9% 0.065 267.3)
#253973 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) | #1B4075 | 0.021 |
| Deuteranopia (no green cones) | #0A3972 | 0.024 |
| Tritanopia (no blue cones) | #004650 | 0.085 |
| Achromatopsia (no color) | #3C3C3C | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253973
#253973
oklch(36.2% 0.103 266.9)
- #4E3A00
#4E3A00
oklch(36.1% 0.074 86.8)
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 #253973, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.033
- Marine Blue #01386A ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.051
- Marine #042E60 ΔE 0.058
- Cobalt #1E488F ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.064
- Light Navy #155084 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.068
Use #253973 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.