#263A5C
Closest named color: Prussian Blue (#1D3557). oklch(34.9% 0.065 260.5), rgb(38, 58, 92).
Aa
White text reads best on this color (11.39:1).
About this color
#263A5C is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.065 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.022 away. White text reads best on it, at 11.39:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.84:1 |
| White text | 11.39:1 |
Values
| HEX | #263A5C |
| RGB | rgb(38, 58, 92) |
| HSL | hsl(218, 42%, 25%) |
| OKLCH | oklch(34.9% 0.065 260.5) |
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 #263A5C | 11.39:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #263A5C | 1.84:1 | Fails | Lc 7.7 | Not readable |
| #263A5C text on white | 11.39:1 | AAA | Lc 96.2 | Preferred for body text |
| #263A5C text on black | 1.84:1 | 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
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AFC2E1
oklch(81% 0.049 260.2)
-
Step 400
400
#85A2D2
oklch(70.8% 0.078 260.3)
-
Step 500
500
#668AC6
oklch(63.2% 0.1 260.3)
-
Step 600
600
#4D73B3
oklch(55.7% 0.109 260.3)
-
Step 700
700
#3E609A
oklch(49.1% 0.102 260.5)
-
Step 800
800
#344F7D
oklch(42.9% 0.084 260.5)
-
Step 900
900 (this color)
#263A5C
oklch(34.9% 0.065 260.5)
-
Step 950
950
#1B273B
oklch(27.2% 0.041 260.3)
#263A5C 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) | #2C3D5D | 0.013 |
| Deuteranopia (no green cones) | #26385B | 0.006 |
| Tritanopia (no blue cones) | #064146 | 0.058 |
| Achromatopsia (no color) | #3A3A3A | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263A5C
#263A5C
oklch(34.9% 0.065 260.5)
- #4C360A
#4C360A
oklch(34.9% 0.065 80.1)
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 #263A5C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.030
- Marine Blue #01386A ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.040
- Midnight Green #073B4C ΔE 0.042
- Charcoal #264653 ΔE 0.046
- Gunmetal #293241 ΔE 0.049
- Onyx #343A40 ΔE 0.052
Use #263A5C 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.