#4282B5
Closest named color: Steel Blue (#4682B4). oklch(58.7% 0.103 244.9), rgb(66, 130, 181).
Aa
Black text reads best on this color (5.09:1).
About this color
#4282B5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.103 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.004 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.09:1 |
| White text | 4.12:1 |
Values
| HEX | #4282B5 |
| RGB | rgb(66, 130, 181) |
| HSL | hsl(207, 47%, 48%) |
| OKLCH | oklch(58.7% 0.103 244.9) |
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 #4282B5 | 4.12:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #4282B5 | 5.09:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #4282B5 text on white | 4.12:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #4282B5 text on black | 5.09:1 | AA | Lc -33.5 | 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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE9
oklch(88.4% 0.025 246.2)
-
Step 300
300
#A8C4DD
oklch(80.8% 0.047 245.4)
-
Step 400
400
#79A6CC
oklch(70.7% 0.074 244.6)
-
Step 500
500
#558FBF
oklch(63% 0.095 245.1)
-
Step 600
600 (this color)
#4282B5
oklch(58.7% 0.103 244.9)
-
Step 700
700
#2A6593
oklch(49% 0.096 245.2)
-
Step 800
800
#245377
oklch(42.7% 0.079 244.4)
-
Step 900
900
#234560
oklch(37.8% 0.061 244.4)
-
Step 950
950
#152838
oklch(26.9% 0.039 245.4)
#4282B5 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) | #6C83B7 | 0.046 |
| Deuteranopia (no green cones) | #5C78B4 | 0.036 |
| Tritanopia (no blue cones) | #008E94 | 0.077 |
| Achromatopsia (no color) | #7D7D7D | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4282B5
#4282B5
oklch(58.7% 0.103 244.9)
- #A66E34
#A66E34
oklch(58.6% 0.102 64.2)
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 #4282B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.004
- Cool Blue #4984B8 ΔE 0.010
- Off Blue #5684AE ΔE 0.024
- Dusty Blue #5A86AD ΔE 0.031
- Blue NCS #118AB2 ΔE 0.033
- Windows Blue #3778BF ΔE 0.038
- Cerulean #457B9D ΔE 0.038
- Stormy Blue #507B9C ΔE 0.039
Use #4282B5 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.