#182E39
Closest named color: Oxford Blue (#1B263B). oklch(28.8% 0.034 231.4), rgb(24, 46, 57).
Aa
White text reads best on this color (14.10:1).
About this color
#182E39 is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.034 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.029 away. White text reads best on it, at 14.10:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.48:1 |
| White text | 14.10:1 |
Values
| HEX | #182E39 |
| RGB | rgb(24, 46, 57) |
| HSL | hsl(200, 41%, 16%) |
| OKLCH | oklch(28.8% 0.034 231.4) |
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 #182E39 | 14.10:1 | AAA | Lc -103.7 | Preferred for body text |
| Black text on #182E39 | 1.48:1 | Fails | Lc 0.0 | Not readable |
| #182E39 text on white | 14.10:1 | AAA | Lc 100.7 | Preferred for body text |
| #182E39 text on black | 1.48:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2EBF0
oklch(93.5% 0.012 231.7)
-
Step 200
200
#CBDCE6
oklch(88.5% 0.023 233.4)
-
Step 300
300
#A7C6D7
oklch(80.9% 0.041 231.9)
-
Step 400
400
#76A8C2
oklch(70.6% 0.065 231.5)
-
Step 500
500
#5093B3
oklch(63.2% 0.083 230.8)
-
Step 600
600
#317C9F
oklch(55.5% 0.091 232)
-
Step 700
700
#226988
oklch(49.2% 0.084 231.1)
-
Step 800
800
#1F566E
oklch(42.8% 0.069 230.3)
-
Step 900
900
#204759
oklch(37.8% 0.054 230.4)
-
Step 950
950 (this color)
#182E39
oklch(28.8% 0.034 231.4)
#182E39 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) | #292D3A | 0.025 |
| Deuteranopia (no green cones) | #242A39 | 0.021 |
| Tritanopia (no blue cones) | #073132 | 0.025 |
| Achromatopsia (no color) | #2B2B2B | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182E39
#182E39
oklch(28.8% 0.034 231.4)
- #39261B
#39261B
oklch(28.9% 0.035 51)
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 #182E39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.029
- Gunmetal #293241 ΔE 0.032
- Dark #1B2431 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.034
- Jet #212529 ΔE 0.036
- Midnight Green #073B4C ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.056
Use #182E39 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.