#182D4B
Closest named color: Space Cadet (#2B2D42). oklch(29.6% 0.061 257.4), rgb(24, 45, 75).
Aa
White text reads best on this color (13.85:1).
About this color
#182D4B is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.061 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.031 away. White text reads best on it, at 13.85:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.51:1 |
| White text | 13.85:1 |
Values
| HEX | #182D4B |
| RGB | rgb(24, 45, 75) |
| HSL | hsl(215, 52%, 19%) |
| OKLCH | oklch(29.6% 0.061 257.4) |
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 #182D4B | 13.85:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #182D4B | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #182D4B text on white | 13.85:1 | AAA | Lc 100.3 | Preferred for body text |
| #182D4B text on black | 1.51:1 | 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
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C9DBF4
oklch(88.6% 0.04 256.6)
-
Step 300
300
#A3C3F0
oklch(80.9% 0.073 256.9)
-
Step 400
400
#71A2E8
oklch(70.6% 0.116 257.3)
-
Step 500
500
#4B89E1
oklch(63.1% 0.148 257.4)
-
Step 600
600
#2C71CF
oklch(55.6% 0.161 257.3)
-
Step 700
700
#1F5EB3
oklch(49.1% 0.149 257.4)
-
Step 800
800
#1C4D91
oklch(42.6% 0.124 257.6)
-
Step 900
900
#1D4174
oklch(37.7% 0.097 257.5)
-
Step 950
950 (this color)
#182D4B
oklch(29.6% 0.061 257.4)
#182D4B 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) | #202F4C | 0.013 |
| Deuteranopia (no green cones) | #192A4A | 0.010 |
| Tritanopia (no blue cones) | #003438 | 0.052 |
| Achromatopsia (no color) | #2D2D2D | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182D4B
#182D4B
oklch(29.6% 0.061 257.4)
- #3E2801
#3E2801
oklch(29.6% 0.061 76.4)
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 #182D4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.032
- Oxford Blue #1B263B ΔE 0.033
- Gunmetal #293241 ΔE 0.037
- Marine #042E60 ΔE 0.040
- Midnight Green #073B4C ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.048
- Dark #1B2431 ΔE 0.051
Use #182D4B 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.