#4971B3
Closest named color: French Blue (#436BAD). oklch(55% 0.113 259.9), rgb(73, 113, 179).
Aa
White text reads best on this color (4.88:1).
About this color
#4971B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.113 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.020 away. White text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.29:1 |
| White text | 4.88:1 |
Values
| HEX | #4971B3 |
| RGB | rgb(73, 113, 179) |
| HSL | hsl(217, 42%, 49%) |
| OKLCH | oklch(55% 0.113 259.9) |
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 #4971B3 | 4.88:1 | AA | Lc -79.1 | Fine for body text |
| Black text on #4971B3 | 4.29:1 | AA large text | Lc 30.4 | Non-text elements, placeholder text |
| #4971B3 text on white | 4.88:1 | AA | Lc 73.7 | Content text, not long reading |
| #4971B3 text on black | 4.29:1 | AA large text | Lc -28.0 | Dividers and decoration only |
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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAEC
oklch(88.5% 0.028 258.4)
-
Step 300
300
#AEC2E2
oklch(81% 0.05 259.8)
-
Step 400
400
#83A2D4
oklch(70.8% 0.081 259.8)
-
Step 500
500
#648AC8
oklch(63.2% 0.103 259.9)
-
Step 600
600 (this color)
#4971B3
oklch(55% 0.113 259.9)
-
Step 700
700
#3C609C
oklch(49.1% 0.105 260.1)
-
Step 800
800
#324F7E
oklch(42.8% 0.086 259.7)
-
Step 900
900
#2C4265
oklch(37.8% 0.066 259.4)
-
Step 950
950
#1A273B
oklch(27.1% 0.042 258.8)
#4971B3 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) | #5576B6 | 0.021 |
| Deuteranopia (no green cones) | #476CB2 | 0.014 |
| Tritanopia (no blue cones) | #008089 | 0.099 |
| Achromatopsia (no color) | #717171 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4971B3
#4971B3
oklch(55% 0.113 259.9)
- #946903
#946903
oklch(55.1% 0.113 80.1)
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 #4971B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.024
- Windows Blue #3778BF ΔE 0.026
- Muted Blue #3B719F ΔE 0.036
- Mid Blue #276AB3 ΔE 0.039
- Dull Blue #49759C ΔE 0.041
- Nice Blue #107AB0 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.048
Use #4971B3 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.