#101021
Closest named color: Rich Navy (#001219). oklch(18.3% 0.034 282.5), rgb(16, 16, 33).
Aa
White text reads best on this color (18.78:1).
About this color
#101021 is a very dark, muted purple. In OKLCH its lightness is 18%, its chroma 0.034 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.036 away. White text reads best on it, at 18.78:1.
| Hue family | Purples |
| Lightness | very dark (18%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.11:1 |
| White text | 18.78:1 |
Values
| HEX | #101021 |
| RGB | rgb(16, 16, 33) |
| HSL | hsl(240, 35%, 10%) |
| OKLCH | oklch(18.3% 0.034 282.5) |
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 #101021 | 18.78:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #101021 | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #101021 text on white | 18.78:1 | AAA | Lc 105.3 | Preferred for body text |
| #101021 text on black | 1.11:1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D6D8E8
oklch(88.5% 0.022 280.3)
-
Step 300
300
#BCBEDB
oklch(80.9% 0.041 282.3)
-
Step 400
400
#9A9CC9
oklch(70.7% 0.066 282.6)
-
Step 500
500
#8283BB
oklch(63.1% 0.084 282.9)
-
Step 600
600
#6B6CA7
oklch(55.5% 0.091 282.3)
-
Step 700
700
#5A5A8F
oklch(49.1% 0.084 282.9)
-
Step 800
800
#494A74
oklch(42.7% 0.069 282)
-
Step 900
900
#3D3E5E
oklch(37.7% 0.054 282.1)
-
Step 950
950 (this color)
#101021
oklch(18.3% 0.034 282.5)
#101021 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) | #0A1222 | 0.012 |
| Deuteranopia (no green cones) | #0A1121 | 0.011 |
| Tritanopia (no blue cones) | #0B1316 | 0.030 |
| Achromatopsia (no color) | #121212 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101021
#101021
oklch(18.3% 0.034 282.5)
- #151302
#151302
oklch(18.4% 0.034 103.8)
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 #101021, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.036
- Rich Black #0D1B2A ΔE 0.040
- Almost Black #070D0D ΔE 0.047
- Dark Navy #000435 ΔE 0.068
- Midnight #03012D ΔE 0.068
- Dark Navy Blue #00022E ΔE 0.070
- Very Dark Blue #000133 ΔE 0.075
- Navy Blue #001146 ΔE 0.076
Use #101021 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.