#182133
Closest named color: Dark (#1B2431). oklch(24.8% 0.037 263.6), rgb(24, 33, 51).
Aa
White text reads best on this color (16.10:1).
About this color
#182133 is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.037 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.014 away. White text reads best on it, at 16.10:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.30:1 |
| White text | 16.10:1 |
Values
| HEX | #182133 |
| RGB | rgb(24, 33, 51) |
| HSL | hsl(220, 36%, 15%) |
| OKLCH | oklch(24.8% 0.037 263.6) |
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 #182133 | 16.10:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #182133 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #182133 text on white | 16.10:1 | AAA | Lc 103.0 | Preferred for body text |
| #182133 text on black | 1.30:1 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EA
oklch(88.4% 0.025 265.6)
-
Step 300
300
#B2C1DE
oklch(80.9% 0.044 263.6)
-
Step 400
400
#8AA1CD
oklch(70.7% 0.07 263.2)
-
Step 500
500
#6D89C0
oklch(63.1% 0.089 263.3)
-
Step 600
600
#5572AC
oklch(55.5% 0.097 263.3)
-
Step 700
700
#465F94
oklch(49% 0.091 264.2)
-
Step 800
800
#394E78
oklch(42.6% 0.075 263.3)
-
Step 900
900
#314161
oklch(37.7% 0.059 263.5)
-
Step 950
950 (this color)
#182133
oklch(24.8% 0.037 263.6)
#182133 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) | #1A2234 | 0.005 |
| Deuteranopia (no green cones) | #182033 | 0.004 |
| Tritanopia (no blue cones) | #0E2527 | 0.034 |
| Achromatopsia (no color) | #212121 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182133
#182133
oklch(24.8% 0.037 263.6)
- #2A200B
#2A200B
oklch(25% 0.037 84)
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 #182133, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.014
- Oxford Blue #1B263B ΔE 0.021
- Jet #212529 ΔE 0.031
- Rich Black #0D1B2A ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.058
- Gunmetal #293241 ΔE 0.067
- Navy Blue #001146 ΔE 0.076
- Rich Navy #001219 ΔE 0.083
Use #182133 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.