#477DA7
Closest named color: Cerulean (#457B9D). oklch(57% 0.087 243.6), rgb(71, 125, 167).
Aa
Black text reads best on this color (4.75:1).
About this color
#477DA7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.087 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.016 away. Black text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.75:1 |
| White text | 4.41:1 |
Values
| HEX | #477DA7 |
| RGB | rgb(71, 125, 167) |
| HSL | hsl(206, 40%, 47%) |
| OKLCH | oklch(57% 0.087 243.6) |
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 #477DA7 | 4.41:1 | AA large text | Lc -75.9 | Fine for body text |
| Black text on #477DA7 | 4.75:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #477DA7 text on white | 4.41:1 | AA large text | Lc 70.4 | Content text, not long reading |
| #477DA7 text on black | 4.75:1 | AA | Lc -31.2 | 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
#7FA6C5
oklch(70.8% 0.062 242.7)
-
Step 500
500
#5E8FB7
oklch(63.1% 0.08 244.2)
-
Step 600
600 (this color)
#477DA7
oklch(57% 0.087 243.6)
-
Step 700
700
#34658B
oklch(49% 0.081 244)
-
Step 800
800
#2C5371
oklch(42.7% 0.067 243.5)
-
Step 900
900
#28455B
oklch(37.8% 0.052 242.6)
-
Step 950
950
#182835
oklch(26.9% 0.033 243.9)
#477DA7 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) | #6B7DA9 | 0.042 |
| Deuteranopia (no green cones) | #5E74A6 | 0.034 |
| Tritanopia (no blue cones) | #00878B | 0.071 |
| Achromatopsia (no color) | #787878 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #477DA7
#477DA7
oklch(57% 0.087 243.6)
- #9B6C3E
#9B6C3E
oklch(57% 0.086 64)
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 #477DA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.016
- Stormy Blue #507B9C ΔE 0.018
- Steel Blue #4682B4 ΔE 0.022
- Dull Blue #49759C ΔE 0.025
- Off Blue #5684AE ΔE 0.028
- Cool Blue #4984B8 ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.035
Use #477DA7 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.