#263C5C
Closest named color: Prussian Blue (#1D3557). oklch(35.4% 0.063 257.7), rgb(38, 60, 92).
Aa
White text reads best on this color (11.15:1).
About this color
#263C5C is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.063 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 11.15:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.88:1 |
| White text | 11.15:1 |
Values
| HEX | #263C5C |
| RGB | rgb(38, 60, 92) |
| HSL | hsl(216, 42%, 25%) |
| OKLCH | oklch(35.4% 0.063 257.7) |
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 #263C5C | 11.15:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #263C5C | 1.88:1 | Fails | Lc 8.2 | Not readable |
| #263C5C text on white | 11.15:1 | AAA | Lc 95.7 | Preferred for body text |
| #263C5C text on black | 1.88:1 | 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
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AEC2DF
oklch(80.8% 0.047 257.6)
-
Step 400
400
#83A2D0
oklch(70.6% 0.076 258.1)
-
Step 500
500
#648BC3
oklch(63.1% 0.096 257.4)
-
Step 600
600
#4B74B0
oklch(55.6% 0.105 257.8)
-
Step 700
700
#3C6197
oklch(49.1% 0.097 257.8)
-
Step 800
800
#324F7B
oklch(42.6% 0.081 258.5)
-
Step 900
900 (this color)
#263C5C
oklch(35.4% 0.063 257.7)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#263C5C 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) | #2F3E5D | 0.014 |
| Deuteranopia (no green cones) | #28395B | 0.009 |
| Tritanopia (no blue cones) | #064347 | 0.056 |
| Achromatopsia (no color) | #3B3B3B | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263C5C
#263C5C
oklch(35.4% 0.063 257.7)
- #4E370F
#4E370F
oklch(35.5% 0.063 77.5)
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 #263C5C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.029
- Dark Grey Blue #29465B ΔE 0.034
- Charcoal #264653 ΔE 0.040
- Midnight Green #073B4C ΔE 0.042
- Marine Blue #01386A ΔE 0.042
- Onyx #343A40 ΔE 0.050
- Gunmetal #293241 ΔE 0.051
Use #263C5C 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.