#4279AE
Closest named color: Flat Blue (#3C73A8). oklch(56.2% 0.101 249.3), rgb(66, 121, 174).
Aa
White text reads best on this color (4.58:1).
About this color
#4279AE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.101 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.020 away. White text reads best on it, at 4.58:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.57:1 |
| White text | 4.58:1 |
Values
| HEX | #4279AE |
| RGB | rgb(66, 121, 174) |
| HSL | hsl(209, 45%, 47%) |
| OKLCH | oklch(56.2% 0.101 249.3) |
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 #4279AE | 4.58:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #4279AE | 4.57:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #4279AE text on white | 4.58:1 | AA | Lc 71.7 | Content text, not long reading |
| #4279AE text on black | 4.57:1 | AA | Lc -30.0 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ABC4DD
oklch(81% 0.045 248.4)
-
Step 400
400
#7DA5CD
oklch(70.8% 0.073 248.9)
-
Step 500
500
#5B8EC0
oklch(63.2% 0.094 249)
-
Step 600
600 (this color)
#4279AE
oklch(56.2% 0.101 249.3)
-
Step 700
700
#326494
oklch(49.1% 0.094 249.5)
-
Step 800
800
#2A5278
oklch(42.8% 0.078 249)
-
Step 900
900
#274461
oklch(37.8% 0.061 249.7)
-
Step 950
950
#172839
oklch(27.1% 0.039 249.5)
#4279AE 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) | #627BB0 | 0.037 |
| Deuteranopia (no green cones) | #5471AD | 0.027 |
| Tritanopia (no blue cones) | #00858C | 0.080 |
| Achromatopsia (no color) | #757575 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4279AE
#4279AE
oklch(56.2% 0.101 249.3)
- #9B692A
#9B692A
oklch(56.2% 0.101 69.1)
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 #4279AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.020
- Steel Blue #4682B4 ΔE 0.027
- Dull Blue #49759C ΔE 0.028
- Windows Blue #3778BF ΔE 0.028
- Nice Blue #107AB0 ΔE 0.029
- Cerulean #457B9D ΔE 0.029
- Muted Blue #3B719F ΔE 0.031
- Stormy Blue #507B9C ΔE 0.033
Use #4279AE 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.