#051D4B
Closest named color: Navy Blue (#001146). oklch(24.6% 0.091 261.3), rgb(5, 29, 75).
Aa
White text reads best on this color (16.35:1).
About this color
#051D4B is a very dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.091 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.038 away. White text reads best on it, at 16.35:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.28:1 |
| White text | 16.35:1 |
Values
| HEX | #051D4B |
| RGB | rgb(5, 29, 75) |
| HSL | hsl(219, 88%, 16%) |
| OKLCH | oklch(24.6% 0.091 261.3) |
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 #051D4B | 16.35:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #051D4B | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #051D4B text on white | 16.35:1 | AAA | Lc 103.0 | Preferred for body text |
| #051D4B text on black | 1.28:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFF
oklch(93.7% 0.03 260.7)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#699FFF
oklch(70.8% 0.152 261.1)
-
Step 500
500
#3F82FF
oklch(63.1% 0.198 261.5)
-
Step 600
600
#0863FB
oklch(55.5% 0.239 261.3)
-
Step 700
700
#0052D8
oklch(49.1% 0.216 261.3)
-
Step 800
800
#0343B1
oklch(42.6% 0.184 261.4)
-
Step 900
900
#0E3B8C
oklch(37.8% 0.143 261.2)
-
Step 950
950 (this color)
#051D4B
oklch(24.6% 0.091 261.3)
#051D4B 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) | #00234D | 0.018 |
| Deuteranopia (no green cones) | #001D4A | 0.006 |
| Tritanopia (no blue cones) | #002930 | 0.071 |
| Achromatopsia (no color) | #202020 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #051D4B
#051D4B
oklch(24.6% 0.091 261.3)
- #2D1E00
#2D1E00
oklch(24.7% 0.051 81.9)
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 #051D4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.054
- Dark Indigo #1F0954 ΔE 0.055
- Darkblue #030764 ΔE 0.061
- Marine #042E60 ΔE 0.062
- Rich Black #0D1B2A ΔE 0.063
- Night Blue #040348 ΔE 0.064
- Dark #1B2431 ΔE 0.064
Use #051D4B 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.