#00538F
Closest named color: Light Navy (#155084). oklch(43.4% 0.12 249.1), rgb(0, 83, 143).
Aa
White text reads best on this color (7.97:1).
About this color
#00538F is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.120 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.019 away. White text reads best on it, at 7.97:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #00538F |
| RGB | rgb(0, 83, 143) |
| HSL | hsl(205, 100%, 28%) |
| OKLCH | oklch(43.4% 0.12 249.1) |
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 #00538F | 7.97:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #00538F | 2.63:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #00538F text on white | 7.97:1 | AAA | Lc 87.0 | Fine for body text |
| #00538F text on black | 2.63:1 | Fails | Lc -15.1 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF2
oklch(88.5% 0.038 248.3)
-
Step 300
300
#9EC5ED
oklch(80.9% 0.071 249.4)
-
Step 400
400
#66A6E3
oklch(70.7% 0.112 248.6)
-
Step 500
500
#378EDC
oklch(63.2% 0.144 249.2)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800 (this color)
#00538F
oklch(43.4% 0.12 249.1)
-
Step 900
900
#0E4471
oklch(37.8% 0.094 249)
-
Step 950
950
#0B2842
oklch(27% 0.059 248.9)
#00538F 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) | #345791 | 0.037 |
| Deuteranopia (no green cones) | #1C4B8E | 0.024 |
| Tritanopia (no blue cones) | #00626A | 0.087 |
| Achromatopsia (no color) | #515151 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00538F
#00538F
oklch(43.4% 0.12 249.1)
- #724500
#724500
oklch(43.3% 0.095 68.3)
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 #00538F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.019
- Dusk Blue #26538D ΔE 0.020
- Deep Sea Blue #015482 ΔE 0.023
- Cobalt #1E488F ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.055
- Peacock Blue #016795 ΔE 0.060
Use #00538F 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.