#182C4B
Closest named color: Oxford Blue (#1B263B). oklch(29.3% 0.063 258.9), rgb(24, 44, 75).
Aa
White text reads best on this color (13.99:1).
About this color
#182C4B is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.063 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.032 away. White text reads best on it, at 13.99:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.50:1 |
| White text | 13.99:1 |
Values
| HEX | #182C4B |
| RGB | rgb(24, 44, 75) |
| HSL | hsl(216, 52%, 19%) |
| OKLCH | oklch(29.3% 0.063 258.9) |
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 #182C4B | 13.99:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #182C4B | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #182C4B text on white | 13.99:1 | AAA | Lc 100.5 | Preferred for body text |
| #182C4B text on black | 1.50:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A4C2F1
oklch(80.8% 0.074 259.3)
-
Step 400
400
#73A1EA
oklch(70.6% 0.119 259.3)
-
Step 500
500
#4D88E4
oklch(63.1% 0.152 259)
-
Step 600
600
#3070D2
oklch(55.7% 0.165 258.9)
-
Step 700
700
#225DB5
oklch(49.1% 0.152 258.7)
-
Step 800
800
#1E4C93
oklch(42.6% 0.127 259.1)
-
Step 900
900
#1E4075
oklch(37.6% 0.099 259)
-
Step 950
950 (this color)
#182C4B
oklch(29.3% 0.063 258.9)
#182C4B 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) | #1F2E4C | 0.012 |
| Deuteranopia (no green cones) | #182A4A | 0.006 |
| Tritanopia (no blue cones) | #003337 | 0.054 |
| Achromatopsia (no color) | #2C2C2C | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182C4B
#182C4B
oklch(29.3% 0.063 258.9)
- #3C2800
#3C2800
oklch(29.4% 0.061 79.7)
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 #182C4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.035
- Marine #042E60 ΔE 0.039
- Gunmetal #293241 ΔE 0.039
- Dark #1B2431 ΔE 0.050
- Midnight Green #073B4C ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.052
Use #182C4B 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.