#4282A4
Closest named color: Cerulean (#457B9D). oklch(57.9% 0.084 234), rgb(66, 130, 164).
Aa
Black text reads best on this color (4.96:1).
About this color
#4282A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.084 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.020 away. Black text reads best on it, at 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.96:1 |
| White text | 4.23:1 |
Values
| HEX | #4282A4 |
| RGB | rgb(66, 130, 164) |
| HSL | hsl(201, 43%, 45%) |
| OKLCH | oklch(57.9% 0.084 234) |
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 #4282A4 | 4.23:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #4282A4 | 4.96:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #4282A4 text on white | 4.23:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #4282A4 text on black | 4.96:1 | AA | Lc -32.6 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE5
oklch(88.5% 0.021 232.2)
-
Step 300
300
#AAC5D6
oklch(80.9% 0.038 235.6)
-
Step 400
400
#7BA7C1
oklch(70.6% 0.061 234.7)
-
Step 500
500
#5891B1
oklch(63% 0.077 234.4)
-
Step 600
600 (this color)
#4282A4
oklch(57.9% 0.084 234)
-
Step 700
700
#2D6886
oklch(49.2% 0.078 233.6)
-
Step 800
800
#26556D
oklch(42.8% 0.065 233.3)
-
Step 900
900
#244658
oklch(37.7% 0.05 233.4)
-
Step 950
950
#162934
oklch(27% 0.032 235.1)
#4282A4 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) | #7281A6 | 0.054 |
| Deuteranopia (no green cones) | #6477A3 | 0.045 |
| Tritanopia (no blue cones) | #008B8D | 0.060 |
| Achromatopsia (no color) | #7B7B7B | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4282A4
#4282A4
oklch(57.9% 0.084 234)
- #A16C49
#A16C49
oklch(57.9% 0.084 53.8)
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 #4282A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.020
- Stormy Blue #507B9C ΔE 0.022
- Steel Blue #4682B4 ΔE 0.026
- Off Blue #5684AE ΔE 0.027
- Dusty Blue #5A86AD ΔE 0.031
- Cool Blue #4984B8 ΔE 0.032
- Blue NCS #118AB2 ΔE 0.033
- Teal Blue #01889F ΔE 0.035
Use #4282A4 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.