#263B5A
Closest named color: Prussian Blue (#1D3557). oklch(35% 0.061 258), rgb(38, 59, 90).
Aa
White text reads best on this color (11.31:1).
About this color
#263B5A is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.061 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.024 away. White text reads best on it, at 11.31:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.85:1 |
| White text | 11.31:1 |
Values
| HEX | #263B5A |
| RGB | rgb(38, 59, 90) |
| HSL | hsl(216, 41%, 25%) |
| OKLCH | oklch(35% 0.061 258) |
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 #263B5A | 11.31:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #263B5A | 1.85:1 | Fails | Lc 7.9 | Not readable |
| #263B5A text on white | 11.31:1 | AAA | Lc 96.0 | Preferred for body text |
| #263B5A text on black | 1.85:1 | Fails | Lc 0.0 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AFC2DF
oklch(80.9% 0.046 258.8)
-
Step 400
400
#84A2CE
oklch(70.6% 0.073 257.9)
-
Step 500
500
#668BC2
oklch(63.2% 0.093 258.1)
-
Step 600
600
#4D74AE
oklch(55.6% 0.101 258.1)
-
Step 700
700
#3E6196
oklch(49.1% 0.095 258.5)
-
Step 800
800
#334F79
oklch(42.6% 0.078 258.3)
-
Step 900
900 (this color)
#263B5A
oklch(35% 0.061 258)
-
Step 950
950
#1A2739
oklch(27% 0.038 256.7)
#263B5A 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) | #2F3D5B | 0.015 |
| Deuteranopia (no green cones) | #283859 | 0.009 |
| Tritanopia (no blue cones) | #094246 | 0.054 |
| Achromatopsia (no color) | #3A3A3A | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263B5A
#263B5A
oklch(35% 0.061 258)
- #4C3610
#4C3610
oklch(35% 0.061 77.7)
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 #263B5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.024
- Dark Blue Grey #1F3B4D ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.036
- Midnight Green #073B4C ΔE 0.039
- Charcoal #264653 ΔE 0.041
- Marine Blue #01386A ΔE 0.043
- Gunmetal #293241 ΔE 0.047
- Onyx #343A40 ΔE 0.048
Use #263B5A 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.