#152133
Closest named color: Dark (#1B2431). oklch(24.6% 0.039 258.3), rgb(21, 33, 51).
Aa
White text reads best on this color (16.18:1).
About this color
#152133 is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.039 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.016 away. White text reads best on it, at 16.18:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.29:1 |
| White text | 16.18:1 |
Values
| HEX | #152133 |
| RGB | rgb(21, 33, 51) |
| HSL | hsl(216, 42%, 14%) |
| OKLCH | oklch(24.6% 0.039 258.3) |
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 #152133 | 16.18:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #152133 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #152133 text on white | 16.18:1 | AAA | Lc 103.1 | Preferred for body text |
| #152133 text on black | 1.29:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AFC2DF
oklch(80.9% 0.046 258.8)
-
Step 400
400
#85A2CE
oklch(70.7% 0.072 258.6)
-
Step 500
500
#668BC2
oklch(63.2% 0.093 258.1)
-
Step 600
600
#4D74AE
oklch(55.6% 0.101 258.1)
-
Step 700
700
#3E6196
oklch(49.1% 0.095 258.5)
-
Step 800
800
#334F79
oklch(42.6% 0.078 258.3)
-
Step 900
900
#2D4262
oklch(37.7% 0.061 258.6)
-
Step 950
950 (this color)
#152133
oklch(24.6% 0.039 258.3)
#152133 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 | 0.009 |
| Deuteranopia (no green cones) | #171F33 | 0.007 |
| Tritanopia (no blue cones) | #082527 | 0.035 |
| Achromatopsia (no color) | #212121 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #152133
#152133
oklch(24.6% 0.039 258.3)
- #2B1E09
#2B1E09
oklch(24.6% 0.039 77.2)
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 #152133, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.016
- Oxford Blue #1B263B ΔE 0.024
- Rich Black #0D1B2A ΔE 0.029
- Jet #212529 ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.061
- Gunmetal #293241 ΔE 0.070
- Navy Blue #001146 ΔE 0.073
- Rich Navy #001219 ΔE 0.080
Use #152133 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.