#182B3E
Closest named color: Oxford Blue (#1B263B). oklch(28.2% 0.043 249.6), rgb(24, 43, 62).
Aa
White text reads best on this color (14.44:1).
About this color
#182B3E is a dark, muted blue. In OKLCH its lightness is 28%, its chroma 0.043 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.017 away. White text reads best on it, at 14.44:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.45:1 |
| White text | 14.44:1 |
Values
| HEX | #182B3E |
| RGB | rgb(24, 43, 62) |
| HSL | hsl(210, 44%, 17%) |
| OKLCH | oklch(28.2% 0.043 249.6) |
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 #182B3E | 14.44:1 | AAA | Lc -104.1 | Preferred for body text |
| Black text on #182B3E | 1.45:1 | Fails | Lc 0.0 | Not readable |
| #182B3E text on white | 14.44:1 | AAA | Lc 101.1 | Preferred for body text |
| #182B3E text on black | 1.45:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A8C4E1
oklch(80.9% 0.051 249.4)
-
Step 400
400
#79A5D2
oklch(70.7% 0.082 249.6)
-
Step 500
500
#558EC6
oklch(63.1% 0.104 249.4)
-
Step 600
600
#3877B3
oklch(55.6% 0.114 249.6)
-
Step 700
700
#2A649A
oklch(49.2% 0.106 249.5)
-
Step 800
800
#24527D
oklch(42.8% 0.088 249.2)
-
Step 900
900
#234464
oklch(37.7% 0.068 249.4)
-
Step 950
950 (this color)
#182B3E
oklch(28.2% 0.043 249.6)
#182B3E 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) | #232C3F | 0.017 |
| Deuteranopia (no green cones) | #1E283E | 0.012 |
| Tritanopia (no blue cones) | #032F32 | 0.036 |
| Achromatopsia (no color) | #2A2A2A | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182B3E
#182B3E
oklch(28.2% 0.043 249.6)
- #372510
#372510
oklch(28.1% 0.043 68.7)
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 #182B3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.017
- Dark #1B2431 ΔE 0.029
- Space Cadet #2B2D42 ΔE 0.031
- Gunmetal #293241 ΔE 0.036
- Jet #212529 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.052
- Midnight Green #073B4C ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.057
Use #182B3E 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.