#4B72AB
Closest named color: Flat Blue (#3C73A8). oklch(54.9% 0.1 257.8), rgb(75, 114, 171).
Aa
White text reads best on this color (4.89:1).
About this color
#4B72AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.100 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.016 away. White text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.29:1 |
| White text | 4.89:1 |
Values
| HEX | #4B72AB |
| RGB | rgb(75, 114, 171) |
| HSL | hsl(216, 39%, 48%) |
| OKLCH | oklch(54.9% 0.1 257.8) |
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 #4B72AB | 4.89:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #4B72AB | 4.29:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #4B72AB text on white | 4.89:1 | AA | Lc 73.8 | Content text, not long reading |
| #4B72AB text on black | 4.29:1 | AA large text | Lc -27.9 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AFC2DE
oklch(80.9% 0.045 258)
-
Step 400
400
#85A2CE
oklch(70.7% 0.072 258.6)
-
Step 500
500
#668BC1
oklch(63.1% 0.092 257.7)
-
Step 600
600 (this color)
#4B72AB
oklch(54.9% 0.1 257.8)
-
Step 700
700
#3E6195
oklch(49.1% 0.093 258.1)
-
Step 800
800
#335079
oklch(42.8% 0.077 257.2)
-
Step 900
900
#2D4261
oklch(37.6% 0.06 258)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#4B72AB 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 | 0.023 |
| Deuteranopia (no green cones) | #4F6DAA | 0.014 |
| Tritanopia (no blue cones) | #097F87 | 0.089 |
| Achromatopsia (no color) | #717171 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B72AB
#4B72AB
oklch(54.9% 0.1 257.8)
- #916921
#916921
oklch(54.9% 0.1 78)
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 #4B72AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.016
- French Blue #436BAD ΔE 0.024
- Muted Blue #3B719F ΔE 0.026
- Dull Blue #49759C ΔE 0.028
- Windows Blue #3778BF ΔE 0.034
- Cerulean #457B9D ΔE 0.039
- Stormy Blue #507B9C ΔE 0.041
- Nice Blue #107AB0 ΔE 0.041
Use #4B72AB 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.