#051328
Closest named color: Rich Black (#0D1B2A). oklch(18.8% 0.048 257.3), rgb(5, 19, 40).
Aa
White text reads best on this color (18.58:1).
About this color
#051328 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.048 and its hue 257°. 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 18.58:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.58:1 |
Values
| HEX | #051328 |
| RGB | rgb(5, 19, 40) |
| HSL | hsl(216, 78%, 9%) |
| OKLCH | oklch(18.8% 0.048 257.3) |
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 #051328 | 18.58:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #051328 | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #051328 text on white | 18.58:1 | AAA | Lc 105.0 | Preferred for body text |
| #051328 text on black | 1.13:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CCDAEE
oklch(88.4% 0.031 257.2)
-
Step 300
300
#AAC2E5
oklch(80.8% 0.056 257.7)
-
Step 400
400
#7DA3D9
oklch(70.8% 0.09 257.2)
-
Step 500
500
#5B8BCE
oklch(63.2% 0.114 256.9)
-
Step 600
600
#4073BB
oklch(55.5% 0.125 257.3)
-
Step 700
700
#3260A2
oklch(49% 0.118 257.6)
-
Step 800
800
#2A4F83
oklch(42.7% 0.097 257.2)
-
Step 900
900
#274269
oklch(37.7% 0.075 257.6)
-
Step 950
950 (this color)
#051328
oklch(18.8% 0.048 257.3)
#051328 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) | #091529 | 0.010 |
| Deuteranopia (no green cones) | #041128 | 0.008 |
| Tritanopia (no blue cones) | #00181B | 0.038 |
| Achromatopsia (no color) | #131313 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #051328
#051328
oklch(18.8% 0.048 257.3)
- #1D1100
#1D1100
oklch(18.9% 0.039 78.4)
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 #051328, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.033
- Rich Navy #001219 ΔE 0.034
- Dark Navy #000435 ΔE 0.056
- Almost Black #070D0D ΔE 0.056
- Navy Blue #001146 ΔE 0.060
- Dark Navy Blue #00022E ΔE 0.062
- Midnight #03012D ΔE 0.063
- Very Dark Blue #000133 ΔE 0.065
Use #051328 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.