#263F77
Closest named color: Twilight Blue (#0A437A). oklch(37.9% 0.1 264.1), rgb(38, 63, 119).
Aa
White text reads best on this color (10.19:1).
About this color
#263F77 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.100 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.022 away. White text reads best on it, at 10.19:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.05:1 |
| White text | 10.19:1 |
Values
| HEX | #263F77 |
| RGB | rgb(38, 63, 119) |
| HSL | hsl(221, 52%, 31%) |
| OKLCH | oklch(37.9% 0.1 264.1) |
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 #263F77 | 10.19:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #263F77 | 2.05:1 | Fails | Lc 10.5 | Not readable |
| #263F77 text on white | 10.19:1 | AAA | Lc 93.4 | Preferred for body text |
| #263F77 text on black | 2.05:1 | Fails | Lc -9.1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF6
oklch(88.6% 0.042 263)
-
Step 300
300
#A8C1F2
oklch(80.9% 0.075 263.7)
-
Step 400
400
#7A9FEC
oklch(70.7% 0.121 264)
-
Step 500
500
#5985E6
oklch(63.2% 0.154 264.1)
-
Step 600
600
#3F6CD4
oklch(55.6% 0.168 264.1)
-
Step 700
700
#325AB8
oklch(49.2% 0.156 264.1)
-
Step 800
800
#294A95
oklch(42.8% 0.129 263.9)
-
Step 900
900 (this color)
#263F77
oklch(37.9% 0.1 264.1)
-
Step 950
950
#162545
oklch(27% 0.063 263.8)
#263F77 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) | #244579 | 0.017 |
| Deuteranopia (no green cones) | #163E76 | 0.016 |
| Tritanopia (no blue cones) | #004C55 | 0.084 |
| Achromatopsia (no color) | #414141 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263F77
#263F77
oklch(37.9% 0.1 264.1)
- #553E00
#553E00
oklch(37.9% 0.078 84.8)
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 #263F77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.022
- Cobalt #1E488F ΔE 0.044
- Marine Blue #01386A ΔE 0.045
- Light Navy #155084 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.062
Use #263F77 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.