#263A87
Closest named color: Cobalt (#1E488F). oklch(38% 0.131 268.5), rgb(38, 58, 135).
Aa
White text reads best on this color (10.30:1).
About this color
#263A87 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.131 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.039 away. White text reads best on it, at 10.30:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.03:1 |
| White text | 10.30:1 |
Values
| HEX | #263A87 |
| RGB | rgb(38, 58, 135) |
| HSL | hsl(228, 56%, 34%) |
| OKLCH | oklch(38% 0.131 268.5) |
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 #263A87 | 10.30:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #263A87 | 2.03:1 | Fails | Lc 10.4 | Not readable |
| #263A87 text on white | 10.30:1 | AAA | Lc 93.5 | Preferred for body text |
| #263A87 text on black | 2.03:1 | Fails | Lc -9.0 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD9FE
oklch(88.6% 0.054 267.9)
-
Step 300
300
#A7BFFF
oklch(81% 0.095 268.4)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#587DFF
oklch(63.1% 0.197 268.3)
-
Step 600
600
#4061F0
oklch(55.6% 0.217 268.3)
-
Step 700
700
#334FD1
oklch(49.1% 0.202 268.3)
-
Step 800
800
#2A41A9
oklch(42.6% 0.169 268.5)
-
Step 900
900 (this color)
#263A87
oklch(38% 0.131 268.5)
-
Step 950
950
#16224E
oklch(26.9% 0.083 268.8)
#263A87 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) | #00458A | 0.035 |
| Deuteranopia (no green cones) | #003C85 | 0.027 |
| Tritanopia (no blue cones) | #004D5A | 0.107 |
| Achromatopsia (no color) | #404040 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263A87
#263A87
oklch(38% 0.131 268.5)
- #533F00
#533F00
oklch(37.9% 0.077 88.3)
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 #263A87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.039
- Twilight Blue #0A437A ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.052
- Blueberry #464196 ΔE 0.057
- Sapphire #2138AB ΔE 0.060
- Marine Blue #01386A ΔE 0.060
- Light Navy #155084 ΔE 0.063
- Dusk Blue #26538D ΔE 0.070
Use #263A87 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.