#263F6A
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.081 260.6), rgb(38, 63, 106).
Aa
White text reads best on this color (10.49:1).
About this color
#263F6A is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.081 and its hue 261°. 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 10.49:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.00:1 |
| White text | 10.49:1 |
Values
| HEX | #263F6A |
| RGB | rgb(38, 63, 106) |
| HSL | hsl(218, 47%, 28%) |
| OKLCH | oklch(37% 0.081 260.6) |
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 #263F6A | 10.49:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #263F6A | 2.00:1 | Fails | Lc 9.7 | Not readable |
| #263F6A text on white | 10.49:1 | AAA | Lc 94.2 | Preferred for body text |
| #263F6A text on black | 2.00:1 | Fails | Lc -8.4 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF0
oklch(88.5% 0.033 261)
-
Step 300
300
#ABC2E8
oklch(81% 0.06 260.4)
-
Step 400
400
#7EA1DD
oklch(70.7% 0.097 260.9)
-
Step 500
500
#5D89D4
oklch(63.2% 0.124 260.5)
-
Step 600
600
#4371C1
oklch(55.5% 0.135 260.7)
-
Step 700
700
#355EA7
oklch(49% 0.126 261)
-
Step 800
800
#2C4D87
oklch(42.6% 0.104 260.8)
-
Step 900
900 (this color)
#263F6A
oklch(37% 0.081 260.6)
-
Step 950
950
#18263F
oklch(27% 0.051 261.4)
#263F6A 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) | #2D436C | 0.016 |
| Deuteranopia (no green cones) | #233C69 | 0.010 |
| Tritanopia (no blue cones) | #00494F | 0.070 |
| Achromatopsia (no color) | #3F3F3F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263F6A
#263F6A
oklch(37% 0.081 260.6)
- #543A00
#543A00
oklch(36.9% 0.076 80.3)
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 #263F6A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.039
- Marine Blue #01386A ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.045
- Charcoal #264653 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.052
- Light Navy #155084 ΔE 0.060
- Midnight Green #073B4C ΔE 0.062
Use #263F6A 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.