#4281BA
Closest named color: Steel Blue (#4682B4). oklch(58.7% 0.109 248.1), rgb(66, 129, 186).
Aa
Black text reads best on this color (5.08:1).
About this color
#4281BA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.109 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.011 away. Black text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.08:1 |
| White text | 4.13:1 |
Values
| HEX | #4281BA |
| RGB | rgb(66, 129, 186) |
| HSL | hsl(209, 48%, 49%) |
| OKLCH | oklch(58.7% 0.109 248.1) |
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 #4281BA | 4.13:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #4281BA | 5.08:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #4281BA text on white | 4.13:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #4281BA text on black | 5.08:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEB
oklch(88.5% 0.027 249.9)
-
Step 300
300
#A8C4E0
oklch(80.9% 0.05 248.4)
-
Step 400
400
#79A5D0
oklch(70.6% 0.079 248.4)
-
Step 500
500
#558EC3
oklch(63% 0.1 248)
-
Step 600
600 (this color)
#4281BA
oklch(58.7% 0.109 248.1)
-
Step 700
700
#2A6497
oklch(49% 0.102 248.1)
-
Step 800
800
#24527B
oklch(42.7% 0.085 248.1)
-
Step 900
900
#234463
oklch(37.7% 0.066 248.6)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#4281BA 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) | #6883BC | 0.042 |
| Deuteranopia (no green cones) | #5878B9 | 0.031 |
| Tritanopia (no blue cones) | #008E95 | 0.084 |
| Achromatopsia (no color) | #7D7D7D | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4281BA
#4281BA
oklch(58.7% 0.109 248.1)
- #A76F29
#A76F29
oklch(58.8% 0.11 68.2)
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 #4281BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.011
- Cool Blue #4984B8 ΔE 0.012
- Off Blue #5684AE ΔE 0.029
- Windows Blue #3778BF ΔE 0.031
- Water Blue #0E87CC ΔE 0.035
- Dusty Blue #5A86AD ΔE 0.037
- Blue NCS #118AB2 ΔE 0.039
- Nice Blue #107AB0 ΔE 0.041
Use #4281BA 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.