#263F5E
Closest named color: Dark Grey Blue (#29465B). oklch(36.3% 0.062 254.5), rgb(38, 63, 94).
Aa
White text reads best on this color (10.74:1).
About this color
#263F5E is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.062 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 10.74:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.95:1 |
| White text | 10.74:1 |
Values
| HEX | #263F5E |
| RGB | rgb(38, 63, 94) |
| HSL | hsl(213, 42%, 26%) |
| OKLCH | oklch(36.3% 0.062 254.5) |
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 #263F5E | 10.74:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #263F5E | 1.95:1 | Fails | Lc 9.1 | Not readable |
| #263F5E text on white | 10.74:1 | AAA | Lc 94.8 | Preferred for body text |
| #263F5E text on black | 1.95:1 | Fails | Lc -7.8 | 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
#CEDAEA
oklch(88.4% 0.026 255.6)
-
Step 300
300
#ADC3DF
oklch(81% 0.046 254.5)
-
Step 400
400
#81A3CF
oklch(70.7% 0.075 255.1)
-
Step 500
500
#608CC2
oklch(63.1% 0.095 254.1)
-
Step 600
600
#4675AF
oklch(55.5% 0.105 254.5)
-
Step 700
700
#386296
oklch(49% 0.096 254.7)
-
Step 800
800
#2F507A
oklch(42.6% 0.08 255.1)
-
Step 900
900 (this color)
#263F5E
oklch(36.3% 0.062 254.5)
-
Step 950
950
#192739
oklch(26.9% 0.039 255.1)
#263F5E 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) | #32415F | 0.018 |
| Deuteranopia (no green cones) | #2B3B5D | 0.013 |
| Tritanopia (no blue cones) | #02464A | 0.055 |
| Achromatopsia (no color) | #3E3E3E | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263F5E
#263F5E
oklch(36.3% 0.062 254.5)
- #513813
#513813
oklch(36.2% 0.063 73.9)
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 #263F5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Dark Blue Grey #1F3B4D ΔE 0.032
- Charcoal #264653 ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.036
- Midnight Green #073B4C ΔE 0.045
- Marine Blue #01386A ΔE 0.046
- Twilight Blue #0A437A ΔE 0.050
- Onyx #343A40 ΔE 0.052
Use #263F5E 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.