#263F5F
Closest named color: Dark Grey Blue (#29465B). oklch(36.3% 0.064 255.2), rgb(38, 63, 95).
Aa
White text reads best on this color (10.72:1).
About this color
#263F5F is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.064 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.026 away. White text reads best on it, at 10.72:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.95:1 |
| White text | 10.72:1 |
Values
| HEX | #263F5F |
| RGB | rgb(38, 63, 95) |
| HSL | hsl(214, 43%, 26%) |
| OKLCH | oklch(36.3% 0.064 255.2) |
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 #263F5F | 10.72:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #263F5F | 1.95:1 | Fails | Lc 9.2 | Not readable |
| #263F5F text on white | 10.72:1 | AAA | Lc 94.7 | Preferred for body text |
| #263F5F text on black | 1.95:1 | Fails | Lc -7.9 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#ACC3E0
oklch(80.9% 0.048 254.3)
-
Step 400
400
#80A3D0
oklch(70.6% 0.077 255)
-
Step 500
500
#608CC4
oklch(63.2% 0.098 254.9)
-
Step 600
600
#4675B0
oklch(55.6% 0.106 254.9)
-
Step 700
700
#386298
oklch(49.2% 0.099 255.4)
-
Step 800
800
#2E507B
oklch(42.7% 0.082 255.1)
-
Step 900
900 (this color)
#263F5F
oklch(36.3% 0.064 255.2)
-
Step 950
950
#19273A
oklch(27% 0.041 256.3)
#263F5F 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) | #324160 | 0.018 |
| Deuteranopia (no green cones) | #2B3B5E | 0.013 |
| Tritanopia (no blue cones) | #00464A | 0.057 |
| Achromatopsia (no color) | #3E3E3E | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263F5F
#263F5F
oklch(36.3% 0.064 255.2)
- #513912
#513912
oklch(36.4% 0.063 76.2)
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 #263F5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.034
- Charcoal #264653 ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.036
- Marine Blue #01386A ΔE 0.045
- Midnight Green #073B4C ΔE 0.046
- Twilight Blue #0A437A ΔE 0.048
- Onyx #343A40 ΔE 0.054
Use #263F5F 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.