#477DA9
Closest named color: Cerulean (#457B9D). oklch(57.1% 0.089 244.9), rgb(71, 125, 169).
Aa
Black text reads best on this color (4.77:1).
About this color
#477DA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.089 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.019 away. Black text reads best on it, at 4.77:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.77:1 |
| White text | 4.39:1 |
Values
| HEX | #477DA9 |
| RGB | rgb(71, 125, 169) |
| HSL | hsl(207, 41%, 47%) |
| OKLCH | oklch(57.1% 0.089 244.9) |
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 #477DA9 | 4.39:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #477DA9 | 4.77:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #477DA9 text on white | 4.39:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #477DA9 text on black | 4.77:1 | AA | Lc -31.3 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#ACC4D9
oklch(80.9% 0.04 244.7)
-
Step 400
400
#7FA5C7
oklch(70.6% 0.065 245.9)
-
Step 500
500
#5D8FB8
oklch(63.1% 0.082 244.4)
-
Step 600
600 (this color)
#477DA9
oklch(57.1% 0.089 244.9)
-
Step 700
700
#34658D
oklch(49.1% 0.084 245.3)
-
Step 800
800
#2C5372
oklch(42.8% 0.068 244.4)
-
Step 900
900
#28455C
oklch(37.8% 0.053 243.8)
-
Step 950
950
#182836
oklch(27% 0.034 245.9)
#477DA9 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) | #6A7EAB | 0.041 |
| Deuteranopia (no green cones) | #5D74A8 | 0.033 |
| Tritanopia (no blue cones) | #00888C | 0.074 |
| Achromatopsia (no color) | #787878 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #477DA9
#477DA9
oklch(57.1% 0.089 244.9)
- #9C6C3B
#9C6C3B
oklch(57.1% 0.089 64.9)
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 #477DA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.019
- Steel Blue #4682B4 ΔE 0.020
- Stormy Blue #507B9C ΔE 0.021
- Dull Blue #49759C ΔE 0.027
- Off Blue #5684AE ΔE 0.028
- Cool Blue #4984B8 ΔE 0.028
- Flat Blue #3C73A8 ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.035
Use #477DA9 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.