#477E9B
Closest named color: Cerulean (#457B9D). oklch(56.7% 0.074 233.1), rgb(71, 126, 155).
Aa
Black text reads best on this color (4.72:1).
About this color
#477E9B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.074 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.011 away. Black text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.72:1 |
| White text | 4.44:1 |
Values
| HEX | #477E9B |
| RGB | rgb(71, 126, 155) |
| HSL | hsl(201, 37%, 44%) |
| OKLCH | oklch(56.7% 0.074 233.1) |
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 #477E9B | 4.44:1 | AA large text | Lc -76.2 | Fine for body text |
| Black text on #477E9B | 4.72:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #477E9B text on white | 4.44:1 | AA large text | Lc 70.7 | Content text, not long reading |
| #477E9B text on black | 4.72:1 | AA | Lc -31.0 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDBE3
oklch(88.4% 0.018 234.5)
-
Step 300
300
#ACC5D3
oklch(80.9% 0.034 232.3)
-
Step 400
400
#80A7BD
oklch(70.8% 0.053 233.2)
-
Step 500
500
#5F91AC
oklch(63.2% 0.067 232.9)
-
Step 600
600 (this color)
#477E9B
oklch(56.7% 0.074 233.1)
-
Step 700
700
#356781
oklch(49% 0.068 233.2)
-
Step 800
800
#2D5469
oklch(42.6% 0.056 233.8)
-
Step 900
900
#294655
oklch(37.8% 0.043 232.1)
-
Step 950
950
#182932
oklch(27% 0.028 232.3)
#477E9B 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) | #707D9C | 0.049 |
| Deuteranopia (no green cones) | #64749B | 0.042 |
| Tritanopia (no blue cones) | #0E8687 | 0.057 |
| Achromatopsia (no color) | #787878 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #477E9B
#477E9B
oklch(56.7% 0.074 233.1)
- #996A4D
#996A4D
oklch(56.6% 0.074 52.4)
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 #477E9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.011
- Stormy Blue #507B9C ΔE 0.012
- Dull Blue #49759C ΔE 0.027
- Metallic Blue #4F738E ΔE 0.033
- Grey Blue #647D8E ΔE 0.036
- Off Blue #5684AE ΔE 0.037
- Steel Blue #4682B4 ΔE 0.038
- Teal Blue #01889F ΔE 0.040
Use #477E9B 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.