#4E72AB
Closest named color: Flat Blue (#3C73A8). oklch(55.1% 0.099 259.3), rgb(78, 114, 171).
Aa
White text reads best on this color (4.86:1).
About this color
#4E72AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.099 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.019 away. White text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.31:1 |
| White text | 4.86:1 |
Values
| HEX | #4E72AB |
| RGB | rgb(78, 114, 171) |
| HSL | hsl(217, 37%, 49%) |
| OKLCH | oklch(55.1% 0.099 259.3) |
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 #4E72AB | 4.86:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #4E72AB | 4.31:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #4E72AB text on white | 4.86:1 | AA | Lc 73.6 | Content text, not long reading |
| #4E72AB text on black | 4.31:1 | AA large text | Lc -28.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B0C2DE
oklch(80.9% 0.044 259.2)
-
Step 400
400
#86A2CD
oklch(70.7% 0.071 258.8)
-
Step 500
500
#688AC0
oklch(63% 0.091 259.4)
-
Step 600
600 (this color)
#4E72AB
oklch(55.1% 0.099 259.3)
-
Step 700
700
#406194
oklch(49.1% 0.091 258.8)
-
Step 800
800
#354F78
oklch(42.6% 0.076 259.2)
-
Step 900
900
#2E4261
oklch(37.7% 0.059 258.9)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#4E72AB 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) | #5B76AD | 0.021 |
| Deuteranopia (no green cones) | #506DAA | 0.014 |
| Tritanopia (no blue cones) | #197F87 | 0.088 |
| Achromatopsia (no color) | #717171 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E72AB
#4E72AB
oklch(55.1% 0.099 259.3)
- #906A23
#906A23
oklch(55% 0.099 79.3)
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 #4E72AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.019
- French Blue #436BAD ΔE 0.026
- Dull Blue #49759C ΔE 0.028
- Muted Blue #3B719F ΔE 0.029
- Windows Blue #3778BF ΔE 0.036
- Cerulean #457B9D ΔE 0.039
- Stormy Blue #507B9C ΔE 0.040
- Nice Blue #107AB0 ΔE 0.044
Use #4E72AB 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.