#021528
Closest named color: Rich Black (#0D1B2A). oklch(19.1% 0.047 248.9), rgb(2, 21, 40).
Aa
White text reads best on this color (18.41:1).
About this color
#021528 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.047 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.029 away. White text reads best on it, at 18.41:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.41:1 |
Values
| HEX | #021528 |
| RGB | rgb(2, 21, 40) |
| HSL | hsl(210, 90%, 8%) |
| OKLCH | oklch(19.1% 0.047 248.9) |
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 #021528 | 18.41:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #021528 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #021528 text on white | 18.41:1 | AAA | Lc 104.9 | Preferred for body text |
| #021528 text on black | 1.14:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A5C4E4
oklch(80.8% 0.056 249.4)
-
Step 400
400
#74A5D6
oklch(70.6% 0.089 249.2)
-
Step 500
500
#4E8ECB
oklch(63.1% 0.114 249)
-
Step 600
600
#2E77B8
oklch(55.5% 0.124 248.9)
-
Step 700
700
#20649F
oklch(49.1% 0.116 249)
-
Step 800
800
#1D5281
oklch(42.8% 0.096 248.9)
-
Step 900
900
#1E4467
oklch(37.7% 0.074 248.7)
-
Step 950
950 (this color)
#021528
oklch(19.1% 0.047 248.9)
#021528 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) | #0C1629 | 0.016 |
| Deuteranopia (no green cones) | #061228 | 0.012 |
| Tritanopia (no blue cones) | #001A1C | 0.035 |
| Achromatopsia (no color) | #141414 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #021528
#021528
oklch(19.1% 0.047 248.9)
- #201000
#201000
oklch(19.2% 0.042 68.9)
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 #021528, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.029
- Rich Navy #001219 ΔE 0.032
- Almost Black #070D0D ΔE 0.057
- Dark Navy #000435 ΔE 0.060
- Navy Blue #001146 ΔE 0.061
- Dark Navy Blue #00022E ΔE 0.067
- Midnight #03012D ΔE 0.068
- Very Dark Blue #000133 ΔE 0.069
Use #021528 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.