#182640
Closest named color: Oxford Blue (#1B263B). oklch(27% 0.052 262), rgb(24, 38, 64).
Aa
White text reads best on this color (15.10:1).
About this color
#182640 is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.052 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.010 away. White text reads best on it, at 15.10:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.10:1 |
Values
| HEX | #182640 |
| RGB | rgb(24, 38, 64) |
| HSL | hsl(219, 45%, 17%) |
| OKLCH | oklch(27% 0.052 262) |
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 #182640 | 15.10:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #182640 | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #182640 text on white | 15.10:1 | AAA | Lc 101.9 | Preferred for body text |
| #182640 text on black | 1.39:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ABC1EA
oklch(80.8% 0.063 262.8)
-
Step 400
400
#7EA1DF
oklch(70.8% 0.099 261.5)
-
Step 500
500
#5E88D6
oklch(63.1% 0.127 261.9)
-
Step 600
600
#4570C3
oklch(55.6% 0.138 262.2)
-
Step 700
700
#365EA9
oklch(49.2% 0.128 261.7)
-
Step 800
800
#2D4D89
oklch(42.8% 0.107 261.8)
-
Step 900
900
#28406D
oklch(37.6% 0.083 262)
-
Step 950
950 (this color)
#182640
oklch(27% 0.052 262)
#182640 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) | #1C2841 | 0.009 |
| Deuteranopia (no green cones) | #17243F | 0.007 |
| Tritanopia (no blue cones) | #032C30 | 0.047 |
| Achromatopsia (no color) | #262626 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182640
#182640
oklch(27% 0.052 262)
- #332303
#332303
oklch(26.9% 0.052 80.9)
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 #182640, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.010
- Dark #1B2431 ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.040
- Jet #212529 ΔE 0.044
- Gunmetal #293241 ΔE 0.051
- Rich Black #0D1B2A ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.060
- Marine #042E60 ΔE 0.060
Use #182640 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.