#021727
Closest named color: Rich Black (#0D1B2A). oklch(19.7% 0.043 243), rgb(2, 23, 39).
Aa
White text reads best on this color (18.19:1).
About this color
#021727 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.043 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 18.19:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.19:1 |
Values
| HEX | #021727 |
| RGB | rgb(2, 23, 39) |
| HSL | hsl(206, 90%, 8%) |
| OKLCH | oklch(19.7% 0.043 243) |
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 #021727 | 18.19:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #021727 | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #021727 text on white | 18.19:1 | AAA | Lc 104.7 | Preferred for body text |
| #021727 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A5C5E0
oklch(80.9% 0.052 243.9)
-
Step 400
400
#73A7D0
oklch(70.7% 0.082 243)
-
Step 500
500
#4B90C3
oklch(63% 0.104 242.8)
-
Step 600
600
#2A7AB0
oklch(55.7% 0.113 242.6)
-
Step 700
700
#1C6697
oklch(49.1% 0.105 243)
-
Step 800
800
#1A537B
oklch(42.6% 0.088 243.6)
-
Step 900
900
#1D4563
oklch(37.7% 0.068 243.8)
-
Step 950
950 (this color)
#021727
oklch(19.7% 0.043 243)
#021727 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) | #0F1728 | 0.019 |
| Deuteranopia (no green cones) | #0A1427 | 0.015 |
| Tritanopia (no blue cones) | #001B1D | 0.029 |
| Achromatopsia (no color) | #151515 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #021727
#021727
oklch(19.7% 0.043 243)
- #231001
#231001
oklch(19.7% 0.043 61.1)
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 #021727, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Rich Navy #001219 ΔE 0.033
- Almost Black #070D0D ΔE 0.058
- Dark #1B2431 ΔE 0.064
- Navy Blue #001146 ΔE 0.065
- Dark Navy #000435 ΔE 0.068
- Jet #212529 ΔE 0.074
- Oxford Blue #1B263B ΔE 0.074
Use #021727 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.