#182D40
Closest named color: Oxford Blue (#1B263B). oklch(28.9% 0.044 247.3), rgb(24, 45, 64).
Aa
White text reads best on this color (14.11:1).
About this color
#182D40 is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.044 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.023 away. White text reads best on it, at 14.11:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.48:1 |
| White text | 14.11:1 |
Values
| HEX | #182D40 |
| RGB | rgb(24, 45, 64) |
| HSL | hsl(208, 45%, 17%) |
| OKLCH | oklch(28.9% 0.044 247.3) |
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 #182D40 | 14.11:1 | AAA | Lc -103.7 | Preferred for body text |
| Black text on #182D40 | 1.48:1 | Fails | Lc 0.0 | Not readable |
| #182D40 text on white | 14.11:1 | AAA | Lc 100.7 | Preferred for body text |
| #182D40 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBEC
oklch(88.4% 0.03 248.2)
-
Step 300
300
#A6C4E1
oklch(80.8% 0.052 247.6)
-
Step 400
400
#75A6D2
oklch(70.7% 0.083 246.4)
-
Step 500
500
#508FC7
oklch(63.2% 0.107 247.2)
-
Step 600
600
#3178B3
oklch(55.6% 0.116 247)
-
Step 700
700
#23659A
oklch(49.2% 0.107 246.8)
-
Step 800
800
#1F527D
oklch(42.6% 0.09 247.4)
-
Step 900
900
#1F4465
oklch(37.6% 0.071 247.8)
-
Step 950
950 (this color)
#182D40
oklch(28.9% 0.044 247.3)
#182D40 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) | #252D41 | 0.018 |
| Deuteranopia (no green cones) | #202940 | 0.016 |
| Tritanopia (no blue cones) | #013134 | 0.036 |
| Achromatopsia (no color) | #2B2B2B | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182D40
#182D40
oklch(28.9% 0.044 247.3)
- #3A2711
#3A2711
oklch(29% 0.045 68.5)
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 #182D40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.023
- Space Cadet #2B2D42 ΔE 0.028
- Gunmetal #293241 ΔE 0.031
- Dark #1B2431 ΔE 0.036
- Jet #212529 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.046
- Midnight Green #073B4C ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.050
Use #182D40 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.