#051533
Closest named color: Rich Black (#0D1B2A). oklch(20.3% 0.064 260.8), rgb(5, 21, 51).
Aa
White text reads best on this color (18.07:1).
About this color
#051533 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.064 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.033 away. White text reads best on it, at 18.07:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.07:1 |
Values
| HEX | #051533 |
| RGB | rgb(5, 21, 51) |
| HSL | hsl(219, 82%, 11%) |
| OKLCH | oklch(20.3% 0.064 260.8) |
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 #051533 | 18.07:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #051533 | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #051533 text on white | 18.07:1 | AAA | Lc 104.6 | Preferred for body text |
| #051533 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A5C2F2
oklch(80.9% 0.075 260.4)
-
Step 400
400
#75A0EC
oklch(70.6% 0.122 261.3)
-
Step 500
500
#5187E5
oklch(63.1% 0.153 260.7)
-
Step 600
600
#356ED3
oklch(55.5% 0.167 260.8)
-
Step 700
700
#285CB7
oklch(49.2% 0.155 260.7)
-
Step 800
800
#224B94
oklch(42.6% 0.129 260.9)
-
Step 900
900
#214076
oklch(37.8% 0.1 260.7)
-
Step 950
950 (this color)
#051533
oklch(20.3% 0.064 260.8)
#051533 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) | #041834 | 0.010 |
| Deuteranopia (no green cones) | #001432 | 0.009 |
| Tritanopia (no blue cones) | #001C21 | 0.049 |
| Achromatopsia (no color) | #161616 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #051533
#051533
oklch(20.3% 0.064 260.8)
- #201400
#201400
oklch(20.2% 0.042 81)
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 #051533, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.033
- Navy Blue #001146 ΔE 0.039
- Dark Navy #000435 ΔE 0.054
- Rich Navy #001219 ΔE 0.055
- Night Blue #040348 ΔE 0.058
- Very Dark Blue #000133 ΔE 0.065
- Dark Navy Blue #00022E ΔE 0.065
- Dark #1B2431 ΔE 0.066
Use #051533 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.