#4281AD
Closest named color: Steel Blue (#4682B4). oklch(58% 0.094 241.4), rgb(66, 129, 173).
Aa
Black text reads best on this color (4.97:1).
About this color
#4281AD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.094 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.012 away. Black text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.97:1 |
| White text | 4.22:1 |
Values
| HEX | #4281AD |
| RGB | rgb(66, 129, 173) |
| HSL | hsl(205, 45%, 47%) |
| OKLCH | oklch(58% 0.094 241.4) |
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 #4281AD | 4.22:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #4281AD | 4.97:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #4281AD text on white | 4.22:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #4281AD text on black | 4.97:1 | AA | Lc -32.7 | 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
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDBE8
oklch(88.4% 0.024 244.2)
-
Step 300
300
#A9C5DA
oklch(80.9% 0.042 240.5)
-
Step 400
400
#7BA6C7
oklch(70.6% 0.067 241.9)
-
Step 500
500
#5790B9
oklch(63.1% 0.086 241.2)
-
Step 600
600 (this color)
#4281AD
oklch(58% 0.094 241.4)
-
Step 700
700
#2C668E
oklch(49% 0.088 241.8)
-
Step 800
800
#265473
oklch(42.8% 0.072 240.8)
-
Step 900
900
#24455D
oklch(37.7% 0.057 241.9)
-
Step 950
950
#162936
oklch(27.1% 0.035 239.7)
#4281AD 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) | #6D81AF | 0.048 |
| Deuteranopia (no green cones) | #5F76AC | 0.041 |
| Tritanopia (no blue cones) | #008C90 | 0.071 |
| Achromatopsia (no color) | #7B7B7B | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4281AD
#4281AD
oklch(58% 0.094 241.4)
- #A26D3C
#A26D3C
oklch(58% 0.094 62)
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 #4281AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.012
- Cool Blue #4984B8 ΔE 0.020
- Off Blue #5684AE ΔE 0.023
- Cerulean #457B9D ΔE 0.026
- Stormy Blue #507B9C ΔE 0.029
- Dusty Blue #5A86AD ΔE 0.030
- Blue NCS #118AB2 ΔE 0.032
- Dull Blue #49759C ΔE 0.038
Use #4281AD 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.