#4572B0
Closest named color: Flat Blue (#3C73A8). oklch(54.9% 0.109 256.7), rgb(69, 114, 176).
Aa
White text reads best on this color (4.89:1).
About this color
#4572B0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.109 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.017 away. White text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.28:1 |
| White text | 4.89:1 |
Values
| HEX | #4572B0 |
| RGB | rgb(69, 114, 176) |
| HSL | hsl(215, 44%, 48%) |
| OKLCH | oklch(54.9% 0.109 256.7) |
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 #4572B0 | 4.89:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #4572B0 | 4.28:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #4572B0 text on white | 4.89:1 | AA | Lc 73.8 | Content text, not long reading |
| #4572B0 text on black | 4.28:1 | 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
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAEC
oklch(88.5% 0.028 258.4)
-
Step 300
300
#ADC2E1
oklch(80.8% 0.05 258)
-
Step 400
400
#81A3D2
oklch(70.8% 0.079 256.6)
-
Step 500
500
#618BC6
oklch(63.1% 0.101 257)
-
Step 600
600 (this color)
#4572B0
oklch(54.9% 0.109 256.7)
-
Step 700
700
#386199
oklch(49% 0.102 256.6)
-
Step 800
800
#2F507C
oklch(42.8% 0.083 256.1)
-
Step 900
900
#2A4264
oklch(37.6% 0.066 257.2)
-
Step 950
950
#19273B
oklch(27% 0.042 257.3)
#4572B0 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) | #5876B3 | 0.026 |
| Deuteranopia (no green cones) | #4A6CAF | 0.017 |
| Tritanopia (no blue cones) | #008089 | 0.092 |
| Achromatopsia (no color) | #717171 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4572B0
#4572B0
oklch(54.9% 0.109 256.7)
- #956711
#956711
oklch(54.9% 0.11 76.3)
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 #4572B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.017
- French Blue #436BAD ΔE 0.020
- Windows Blue #3778BF ΔE 0.027
- Muted Blue #3B719F ΔE 0.030
- Dull Blue #49759C ΔE 0.035
- Nice Blue #107AB0 ΔE 0.037
- Mid Blue #276AB3 ΔE 0.038
- Cerulean #457B9D ΔE 0.045
Use #4572B0 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.