#001533
Closest named color: Rich Black (#0D1B2A). oklch(19.9% 0.067 255.4), rgb(0, 21, 51).
Aa
White text reads best on this color (18.18:1).
About this color
#001533 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.067 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.036 away. White text reads best on it, at 18.18:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.18:1 |
Values
| HEX | #001533 |
| RGB | rgb(0, 21, 51) |
| HSL | hsl(215, 100%, 10%) |
| OKLCH | oklch(19.9% 0.067 255.4) |
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 #001533 | 18.18:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #001533 | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #001533 text on white | 18.18:1 | AAA | Lc 104.6 | Preferred for body text |
| #001533 text on black | 1.15:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF6
oklch(88.4% 0.044 254.8)
-
Step 300
300
#9FC3F3
oklch(80.8% 0.079 255.7)
-
Step 400
400
#69A3EE
oklch(70.7% 0.126 255.4)
-
Step 500
500
#3D8AE8
oklch(63.2% 0.161 255.2)
-
Step 600
600
#1471D6
oklch(55.5% 0.175 255.3)
-
Step 700
700
#025EBA
oklch(49.1% 0.163 255.5)
-
Step 800
800
#0A4D96
oklch(42.6% 0.135 255.4)
-
Step 900
900
#144178
oklch(37.7% 0.106 255.7)
-
Step 950
950 (this color)
#001533
oklch(19.9% 0.067 255.4)
#001533 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) | #041834 | 0.013 |
| Deuteranopia (no green cones) | #001332 | 0.007 |
| Tritanopia (no blue cones) | #001C21 | 0.049 |
| Achromatopsia (no color) | #151515 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001533
#001533
oklch(19.9% 0.067 255.4)
- #211300
#211300
oklch(20.1% 0.042 75.8)
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 #001533, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.036
- Navy Blue #001146 ΔE 0.039
- Dark Navy #000435 ΔE 0.051
- Rich Navy #001219 ΔE 0.053
- Night Blue #040348 ΔE 0.057
- Very Dark Blue #000133 ΔE 0.062
- Dark Navy Blue #00022E ΔE 0.062
- Midnight #03012D ΔE 0.064
Use #001533 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.