#00477C
Closest named color: Twilight Blue (#0A437A). oklch(39.1% 0.108 249.3), rgb(0, 71, 124).
Aa
White text reads best on this color (9.57:1).
About this color
#00477C is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.108 and its hue 249°. 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 9.57:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.19:1 |
| White text | 9.57:1 |
Values
| HEX | #00477C |
| RGB | rgb(0, 71, 124) |
| HSL | hsl(206, 100%, 24%) |
| OKLCH | oklch(39.1% 0.108 249.3) |
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 #00477C | 9.57:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #00477C | 2.19:1 | Fails | Lc 12.4 | Not readable |
| #00477C text on white | 9.57:1 | AAA | Lc 91.6 | Preferred for body text |
| #00477C 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
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C3DCF6
oklch(88.4% 0.045 249.4)
-
Step 300
300
#98C5F4
oklch(80.8% 0.082 250)
-
Step 400
400
#5BA6EE
oklch(70.8% 0.13 249.3)
-
Step 500
500
#1A8DE8
oklch(63% 0.166 249.2)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900 (this color)
#00477C
oklch(39.1% 0.108 249.3)
-
Step 950
950
#042846
oklch(27% 0.068 248.6)
#00477C 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) | #2C4B7E | 0.034 |
| Deuteranopia (no green cones) | #16407B | 0.021 |
| Tritanopia (no blue cones) | #00545B | 0.078 |
| Achromatopsia (no color) | #454545 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00477C
#00477C
oklch(39.1% 0.108 249.3)
- #623B00
#623B00
oklch(39% 0.085 68.8)
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 #00477C, 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 0.037
- Deep Sea Blue #015482 ΔE 0.040
- Marine Blue #01386A ΔE 0.052
- Dusk Blue #26538D ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.060
- Light Navy Blue #2E5A88 ΔE 0.070
Use #00477C 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.