#4281B3
Closest named color: Steel Blue (#4682B4). oklch(58.3% 0.101 244.7), rgb(66, 129, 179).
Aa
Black text reads best on this color (5.02:1).
About this color
#4281B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.101 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.005 away. Black text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.02:1 |
| White text | 4.18:1 |
Values
| HEX | #4281B3 |
| RGB | rgb(66, 129, 179) |
| HSL | hsl(207, 46%, 48%) |
| OKLCH | oklch(58.3% 0.101 244.7) |
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 #4281B3 | 4.18:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #4281B3 | 5.02:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #4281B3 text on white | 4.18:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #4281B3 text on black | 5.02:1 | AA | Lc -33.1 | 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
#A9C4DD
oklch(80.8% 0.046 246.3)
-
Step 400
400
#7AA6CB
oklch(70.7% 0.072 244.4)
-
Step 500
500
#568FBE
oklch(63% 0.093 244.9)
-
Step 600
600 (this color)
#4281B3
oklch(58.3% 0.101 244.7)
-
Step 700
700
#2B6592
oklch(49% 0.094 245)
-
Step 800
800
#255377
oklch(42.7% 0.078 244.8)
-
Step 900
900
#234560
oklch(37.8% 0.061 244.4)
-
Step 950
950
#152838
oklch(26.9% 0.039 245.4)
#4281B3 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) | #6B82B5 | 0.045 |
| Deuteranopia (no green cones) | #5C77B2 | 0.036 |
| Tritanopia (no blue cones) | #008D92 | 0.078 |
| Achromatopsia (no color) | #7C7C7C | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4281B3
#4281B3
oklch(58.3% 0.101 244.7)
- #A46E34
#A46E34
oklch(58.4% 0.101 65.3)
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 #4281B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.005
- Cool Blue #4984B8 ΔE 0.013
- Off Blue #5684AE ΔE 0.024
- Dusty Blue #5A86AD ΔE 0.032
- Blue NCS #118AB2 ΔE 0.034
- Cerulean #457B9D ΔE 0.034
- Stormy Blue #507B9C ΔE 0.036
- Windows Blue #3778BF ΔE 0.037
Use #4281B3 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.