#18263B
Closest named color: Oxford Blue (#1B263B). oklch(26.7% 0.044 258.3), rgb(24, 38, 59).
Aa
White text reads best on this color (15.22:1).
About this color
#18263B is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.044 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.004 away. White text reads best on it, at 15.22:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.37:1 |
| White text | 15.22:1 |
Values
| HEX | #18263B |
| RGB | rgb(24, 38, 59) |
| HSL | hsl(216, 42%, 16%) |
| OKLCH | oklch(26.7% 0.044 258.3) |
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 #18263B | 15.22:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #18263B | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #18263B text on white | 15.22:1 | AAA | Lc 102.1 | Preferred for body text |
| #18263B text on black | 1.37:1 | 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 950.
-
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
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ACC2E3
oklch(80.8% 0.053 258.4)
-
Step 400
400
#80A2D5
oklch(70.6% 0.084 258.3)
-
Step 500
500
#608AC9
oklch(63% 0.106 258.3)
-
Step 600
600
#4773B6
oklch(55.5% 0.116 258.6)
-
Step 700
700
#38609D
oklch(49% 0.108 258.6)
-
Step 800
800
#2F4F7F
oklch(42.7% 0.089 258.3)
-
Step 900
900
#2A4266
oklch(37.7% 0.069 258.3)
-
Step 950
950 (this color)
#18263B
oklch(26.7% 0.044 258.3)
#18263B 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) | #1E273C | 0.010 |
| Deuteranopia (no green cones) | #1A243B | 0.007 |
| Tritanopia (no blue cones) | #072B2D | 0.041 |
| Achromatopsia (no color) | #262626 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18263B
#18263B
oklch(26.7% 0.044 258.3)
- #31230A
#31230A
oklch(26.7% 0.044 79.4)
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 #18263B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.004
- Dark #1B2431 ΔE 0.019
- Jet #212529 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.050
- Gunmetal #293241 ΔE 0.050
- Prussian Blue #1D3557 ΔE 0.065
- Marine #042E60 ΔE 0.068
Use #18263B 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.