#021723
Closest named color: Rich Black (#0D1B2A). oklch(19.4% 0.037 235.3), rgb(2, 23, 35).
Aa
White text reads best on this color (18.27:1).
About this color
#021723 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.037 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.026 away. White text reads best on it, at 18.27:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.27:1 |
Values
| HEX | #021723 |
| RGB | rgb(2, 23, 35) |
| HSL | hsl(202, 89%, 7%) |
| OKLCH | oklch(19.4% 0.037 235.3) |
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 #021723 | 18.27:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #021723 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #021723 text on white | 18.27:1 | AAA | Lc 104.8 | Preferred for body text |
| #021723 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A6C6DA
oklch(81% 0.045 235.5)
-
Step 400
400
#74A8C7
oklch(70.7% 0.071 235.3)
-
Step 500
500
#4D92B9
oklch(63.1% 0.091 235.5)
-
Step 600
600
#2D7CA5
oklch(55.7% 0.099 235.3)
-
Step 700
700
#1E688D
oklch(49% 0.092 235.3)
-
Step 800
800
#1C5573
oklch(42.7% 0.076 235.8)
-
Step 900
900
#1E465D
oklch(37.6% 0.06 236.6)
-
Step 950
950 (this color)
#021723
oklch(19.4% 0.037 235.3)
#021723 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) | #111724 | 0.022 |
| Deuteranopia (no green cones) | #0C1323 | 0.019 |
| Tritanopia (no blue cones) | #001A1B | 0.023 |
| Achromatopsia (no color) | #151515 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #021723
#021723
oklch(19.4% 0.037 235.3)
- #211004
#211004
oklch(19.4% 0.037 56.9)
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 #021723, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.026
- Rich Navy #001219 ΔE 0.027
- Almost Black #070D0D ΔE 0.051
- Dark #1B2431 ΔE 0.066
- Navy Blue #001146 ΔE 0.073
- Dark Navy #000435 ΔE 0.074
- Jet #212529 ΔE 0.074
- Oxford Blue #1B263B ΔE 0.078
Use #021723 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.