#253A7A
Closest named color: Twilight Blue (#0A437A). oklch(36.9% 0.112 267.1), rgb(37, 58, 122).
Aa
White text reads best on this color (10.68:1).
About this color
#253A7A is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.112 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.030 away. White text reads best on it, at 10.68:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.96:1 |
| White text | 10.68:1 |
Values
| HEX | #253A7A |
| RGB | rgb(37, 58, 122) |
| HSL | hsl(225, 53%, 31%) |
| OKLCH | oklch(36.9% 0.112 267.1) |
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 #253A7A | 10.68:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #253A7A | 1.96:1 | Fails | Lc 9.4 | Not readable |
| #253A7A text on white | 10.68:1 | AAA | Lc 94.5 | Preferred for body text |
| #253A7A text on black | 1.96:1 | Fails | Lc -8.1 | 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
#A8C0F8
oklch(81% 0.084 266.5)
-
Step 400
400
#7B9DF4
oklch(70.8% 0.133 266.8)
-
Step 500
500
#5B81F0
oklch(63.1% 0.172 267.2)
-
Step 600
600
#4367DF
oklch(55.5% 0.187 267.4)
-
Step 700
700
#3555C2
oklch(49.1% 0.175 267.2)
-
Step 800
800
#2C469D
oklch(42.7% 0.145 267.3)
-
Step 900
900 (this color)
#253A7A
oklch(36.9% 0.112 267.1)
-
Step 950
950
#172449
oklch(27.1% 0.071 267.1)
#253A7A 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) | #15427C | 0.024 |
| Deuteranopia (no green cones) | #003A79 | 0.028 |
| Tritanopia (no blue cones) | #004954 | 0.092 |
| Achromatopsia (no color) | #3E3E3E | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253A7A
#253A7A
oklch(36.9% 0.112 267.1)
- #513C00
#513C00
oklch(36.9% 0.076 86.3)
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 #253A7A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.030
- Marine Blue #01386A ΔE 0.042
- Cobalt #1E488F ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.063
- Light Navy #155084 ΔE 0.063
- Marine #042E60 ΔE 0.067
- Blueberry #464196 ΔE 0.071
Use #253A7A 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.