#021527
Closest named color: Rich Black (#0D1B2A). oklch(19% 0.045 247.6), rgb(2, 21, 39).
Aa
White text reads best on this color (18.43:1).
About this color
#021527 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.045 and its hue 248°. 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 18.43:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.43:1 |
Values
| HEX | #021527 |
| RGB | rgb(2, 21, 39) |
| HSL | hsl(209, 90%, 8%) |
| OKLCH | oklch(19% 0.045 247.6) |
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 #021527 | 18.43:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #021527 | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #021527 text on white | 18.43:1 | AAA | Lc 104.9 | Preferred for body text |
| #021527 text on black | 1.13:1 | 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
#CADBEC
oklch(88.4% 0.03 248.2)
-
Step 300
300
#A6C4E2
oklch(80.8% 0.054 248.5)
-
Step 400
400
#74A6D4
oklch(70.8% 0.086 247.1)
-
Step 500
500
#4E8FC9
oklch(63.2% 0.11 247.4)
-
Step 600
600
#2F78B5
oklch(55.6% 0.119 247.4)
-
Step 700
700
#21649C
oklch(49% 0.112 248)
-
Step 800
800
#1E527F
oklch(42.7% 0.093 248.2)
-
Step 900
900
#1E4466
oklch(37.6% 0.073 248)
-
Step 950
950 (this color)
#021527
oklch(19% 0.045 247.6)
#021527 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) | #0C1628 | 0.016 |
| Deuteranopia (no green cones) | #071227 | 0.012 |
| Tritanopia (no blue cones) | #00191C | 0.031 |
| Achromatopsia (no color) | #141414 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #021527
#021527
oklch(19% 0.045 247.6)
- #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 #021527, 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 0.030
- Almost Black #070D0D ΔE 0.055
- Dark Navy #000435 ΔE 0.062
- Navy Blue #001146 ΔE 0.063
- Dark Navy Blue #00022E ΔE 0.068
- Midnight #03012D ΔE 0.069
- Dark #1B2431 ΔE 0.070
Use #021527 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.