#477FA5
Closest named color: Cerulean (#457B9D). oklch(57.4% 0.083 240.1), rgb(71, 127, 165).
Aa
Black text reads best on this color (4.84:1).
About this color
#477FA5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.083 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.015 away. Black text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #477FA5 |
| RGB | rgb(71, 127, 165) |
| HSL | hsl(204, 40%, 46%) |
| OKLCH | oklch(57.4% 0.083 240.1) |
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 #477FA5 | 4.33:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #477FA5 | 4.84:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #477FA5 text on white | 4.33:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #477FA5 text on black | 4.84:1 | AA | Lc -31.8 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CDDBE6
oklch(88.4% 0.021 241.4)
-
Step 300
300
#ACC4D7
oklch(80.8% 0.038 241.9)
-
Step 400
400
#7FA6C3
oklch(70.7% 0.06 240.9)
-
Step 500
500
#5D90B4
oklch(63.2% 0.077 240.3)
-
Step 600
600 (this color)
#477FA5
oklch(57.4% 0.083 240.1)
-
Step 700
700
#336688
oklch(49% 0.077 240.1)
-
Step 800
800
#2B536F
oklch(42.6% 0.065 241.1)
-
Step 900
900
#27455A
oklch(37.7% 0.051 240.5)
-
Step 950
950
#182934
oklch(27.1% 0.031 237.8)
#477FA5 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) | #6E7FA7 | 0.046 |
| Deuteranopia (no green cones) | #6175A4 | 0.038 |
| Tritanopia (no blue cones) | #00888C | 0.065 |
| Achromatopsia (no color) | #797979 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #477FA5
#477FA5
oklch(57.4% 0.083 240.1)
- #9D6C44
#9D6C44
oklch(57.3% 0.084 59.3)
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 #477FA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.015
- Stormy Blue #507B9C ΔE 0.017
- Steel Blue #4682B4 ΔE 0.023
- Off Blue #5684AE ΔE 0.026
- Dull Blue #49759C ΔE 0.029
- Cool Blue #4984B8 ΔE 0.030
- Dusty Blue #5A86AD ΔE 0.032
- Blue NCS #118AB2 ΔE 0.040
Use #477FA5 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.