#4282C5
Closest named color: Cool Blue (#4984B8). oklch(59.5% 0.122 251.5), rgb(66, 130, 197).
Aa
Black text reads best on this color (5.23:1).
About this color
#4282C5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.122 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.023 away. Black text reads best on it, at 5.23:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.23:1 |
| White text | 4.01:1 |
Values
| HEX | #4282C5 |
| RGB | rgb(66, 130, 197) |
| HSL | hsl(211, 53%, 52%) |
| OKLCH | oklch(59.5% 0.122 251.5) |
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 #4282C5 | 4.01:1 | AA large text | Lc -72.7 | Content text, not long reading |
| Black text on #4282C5 | 5.23:1 | AA | Lc 36.9 | Non-text elements, placeholder text |
| #4282C5 text on white | 4.01:1 | AA large text | Lc 67.2 | Content text, not long reading |
| #4282C5 text on black | 5.23:1 | AA | Lc -34.5 | 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 500.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEF
oklch(88.5% 0.033 252.5)
-
Step 300
300
#A5C4E7
oklch(80.9% 0.06 251.7)
-
Step 400
400
#73A5DB
oklch(70.8% 0.096 251.1)
-
Step 500
500 (this color)
#4282C5
oklch(59.5% 0.122 251.5)
-
Step 600
600
#2E76BE
oklch(55.7% 0.133 251.5)
-
Step 700
700
#2063A4
oklch(49.2% 0.123 251.4)
-
Step 800
800
#1D5185
oklch(42.8% 0.102 251.5)
-
Step 900
900
#1E436A
oklch(37.6% 0.079 251.8)
-
Step 950
950
#12283E
oklch(27.1% 0.05 250.2)
#4282C5 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) | #6586C8 | 0.040 |
| Deuteranopia (no green cones) | #5279C4 | 0.027 |
| Tritanopia (no blue cones) | #00929A | 0.097 |
| Achromatopsia (no color) | #7F7F7F | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4282C5
#4282C5
oklch(59.5% 0.122 251.5)
- #AB7113
#AB7113
oklch(59.6% 0.122 72)
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 #4282C5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.023
- Steel Blue #4682B4 ΔE 0.027
- Water Blue #0E87CC ΔE 0.027
- Windows Blue #3778BF ΔE 0.031
- Off Blue #5684AE ΔE 0.041
- Dusty Blue #5A86AD ΔE 0.047
- Blue NCS #118AB2 ΔE 0.049
- Nice Blue #107AB0 ΔE 0.051
Use #4282C5 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.