#182F4A
Closest named color: Space Cadet (#2B2D42). oklch(30.1% 0.057 253.6), rgb(24, 47, 74).
Aa
White text reads best on this color (13.59:1).
About this color
#182F4A is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.057 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.029 away. White text reads best on it, at 13.59:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.54:1 |
| White text | 13.59:1 |
Values
| HEX | #182F4A |
| RGB | rgb(24, 47, 74) |
| HSL | hsl(212, 51%, 19%) |
| OKLCH | oklch(30.1% 0.057 253.6) |
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 #182F4A | 13.59:1 | AAA | Lc -103.1 | Preferred for body text |
| Black text on #182F4A | 1.54:1 | Fails | Lc 0.0 | Not readable |
| #182F4A text on white | 13.59:1 | AAA | Lc 100.0 | Preferred for body text |
| #182F4A text on black | 1.54:1 | 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
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A2C4EC
oklch(80.9% 0.068 252.7)
-
Step 400
400
#6FA4E3
oklch(70.7% 0.109 253.5)
-
Step 500
500
#478CDB
oklch(63.2% 0.139 253.5)
-
Step 600
600
#2574C8
oklch(55.6% 0.15 253.5)
-
Step 700
700
#1761AD
oklch(49.1% 0.14 253.5)
-
Step 800
800
#164F8C
oklch(42.6% 0.116 253.6)
-
Step 900
900
#1A4270
oklch(37.6% 0.091 254)
-
Step 950
950 (this color)
#182F4A
oklch(30.1% 0.057 253.6)
#182F4A 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) | #24314B | 0.018 |
| Deuteranopia (no green cones) | #1D2C49 | 0.011 |
| Tritanopia (no blue cones) | #003539 | 0.047 |
| Achromatopsia (no color) | #2E2E2E | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182F4A
#182F4A
oklch(30.1% 0.057 253.6)
- #3F2907
#3F2907
oklch(30.1% 0.057 73.6)
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 #182F4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.029
- Gunmetal #293241 ΔE 0.032
- Oxford Blue #1B263B ΔE 0.036
- Midnight Green #073B4C ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.042
- Marine #042E60 ΔE 0.043
- Dark #1B2431 ΔE 0.052
Use #182F4A 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.