#253779
Closest named color: Twilight Blue (#0A437A). oklch(36.2% 0.115 268.6), rgb(37, 55, 121).
Aa
White text reads best on this color (11.04:1).
About this color
#253779 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.115 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.037 away. White text reads best on it, at 11.04:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.90:1 |
| White text | 11.04:1 |
Values
| HEX | #253779 |
| RGB | rgb(37, 55, 121) |
| HSL | hsl(227, 53%, 31%) |
| OKLCH | oklch(36.2% 0.115 268.6) |
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 #253779 | 11.04:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #253779 | 1.90:1 | Fails | Lc 8.7 | Not readable |
| #253779 text on white | 11.04:1 | AAA | Lc 95.2 | Preferred for body text |
| #253779 text on black | 1.90:1 | Fails | Lc -7.4 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9FA
oklch(88.6% 0.048 268.4)
-
Step 300
300
#A9BFF9
oklch(80.9% 0.086 268.4)
-
Step 400
400
#7D9CF6
oklch(70.8% 0.137 268.4)
-
Step 500
500
#5E80F3
oklch(63.2% 0.176 268.6)
-
Step 600
600
#4666E1
oklch(55.6% 0.19 268.5)
-
Step 700
700
#3853C4
oklch(49% 0.179 268.7)
-
Step 800
800
#2E459E
oklch(42.6% 0.147 268.5)
-
Step 900
900 (this color)
#253779
oklch(36.2% 0.115 268.6)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#253779 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) | #0D407B | 0.029 |
| Deuteranopia (no green cones) | #003878 | 0.028 |
| Tritanopia (no blue cones) | #004752 | 0.096 |
| Achromatopsia (no color) | #3C3C3C | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253779
#253779
oklch(36.2% 0.115 268.6)
- #4D3B00
#4D3B00
oklch(36.2% 0.074 89.3)
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 #253779, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.037
- Marine Blue #01386A ΔE 0.040
- Cobalt #1E488F ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.061
- Marine #042E60 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.065
- Light Navy #155084 ΔE 0.071
- Blueberry #464196 ΔE 0.075
Use #253779 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.