#051923
Closest named color: Rich Black (#0D1B2A). oklch(20.2% 0.033 232.4), rgb(5, 25, 35).
Aa
White text reads best on this color (17.95:1).
About this color
#051923 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.033 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.019 away. White text reads best on it, at 17.95:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 17.95:1 |
Values
| HEX | #051923 |
| RGB | rgb(5, 25, 35) |
| HSL | hsl(200, 75%, 8%) |
| OKLCH | oklch(20.2% 0.033 232.4) |
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 #051923 | 17.95:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #051923 | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #051923 text on white | 17.95:1 | AAA | Lc 104.6 | Preferred for body text |
| #051923 text on black | 1.16:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE5
oklch(88.5% 0.021 232.2)
-
Step 300
300
#A8C6D6
oklch(81% 0.039 231.2)
-
Step 400
400
#79A8C1
oklch(70.7% 0.062 232)
-
Step 500
500
#5492B2
oklch(63.1% 0.08 232.5)
-
Step 600
600
#367C9E
oklch(55.6% 0.087 232.5)
-
Step 700
700
#286887
oklch(49% 0.081 233)
-
Step 800
800
#23556E
oklch(42.7% 0.067 233.2)
-
Step 900
900
#224659
oklch(37.6% 0.053 233.6)
-
Step 950
950 (this color)
#051923
oklch(20.2% 0.033 232.4)
#051923 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) | #141923 | 0.022 |
| Deuteranopia (no green cones) | #101623 | 0.018 |
| Tritanopia (no blue cones) | #001C1C | 0.022 |
| Achromatopsia (no color) | #171717 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #051923
#051923
oklch(20.2% 0.033 232.4)
- #221208
#221208
oklch(20.2% 0.032 52.3)
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 #051923, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.019
- Rich Navy #001219 ΔE 0.034
- Almost Black #070D0D ΔE 0.056
- Dark #1B2431 ΔE 0.057
- Jet #212529 ΔE 0.065
- Oxford Blue #1B263B ΔE 0.070
- Navy Blue #001146 ΔE 0.076
- Dark Navy #000435 ΔE 0.082
Use #051923 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.