#00477D
Closest named color: Twilight Blue (#0A437A). oklch(39.1% 0.11 249.7), rgb(0, 71, 125).
Aa
White text reads best on this color (9.55:1).
About this color
#00477D is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.110 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.012 away. White text reads best on it, at 9.55:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #00477D |
| RGB | rgb(0, 71, 125) |
| HSL | hsl(206, 100%, 25%) |
| OKLCH | oklch(39.1% 0.11 249.7) |
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 #00477D | 9.55:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #00477D | 2.19:1 | Fails | Lc 12.4 | Not readable |
| #00477D text on white | 9.55:1 | AAA | Lc 91.5 | Preferred for body text |
| #00477D text on black | 2.19:1 | Fails | Lc -10.8 | 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 900.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECFA
oklch(93.7% 0.024 248.1)
-
Step 200
200
#C3DCF7
oklch(88.5% 0.046 250.4)
-
Step 300
300
#98C5F4
oklch(80.8% 0.082 250)
-
Step 400
400
#5AA6EF
oklch(70.8% 0.132 249.3)
-
Step 500
500
#198DEA
oklch(63.1% 0.169 249.6)
-
Step 600
600
#0076CA
oklch(55.7% 0.156 249.7)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900 (this color)
#00477D
oklch(39.1% 0.11 249.7)
-
Step 950
950
#042847
oklch(27.1% 0.07 249.3)
#00477D 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) | #2B4B7F | 0.033 |
| Deuteranopia (no green cones) | #15417C | 0.018 |
| Tritanopia (no blue cones) | #00545C | 0.078 |
| Achromatopsia (no color) | #454545 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00477D
#00477D
oklch(39.1% 0.11 249.7)
- #623C00
#623C00
oklch(39.2% 0.085 70)
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 #00477D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.012
- Light Navy #155084 ΔE 0.032
- Cobalt #1E488F ΔE 0.036
- Deep Sea Blue #015482 ΔE 0.040
- Dusk Blue #26538D ΔE 0.051
- Marine Blue #01386A ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.061
- Light Navy Blue #2E5A88 ΔE 0.070
Use #00477D 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.