#4291BB
Closest named color: Faded Blue (#658CBB). oklch(62.5% 0.1 234.8), rgb(66, 145, 187).
Aa
Black text reads best on this color (5.99:1).
About this color
#4291BB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.100 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.034 away. Black text reads best on it, at 5.99:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.99:1 |
| White text | 3.50:1 |
Values
| HEX | #4291BB |
| RGB | rgb(66, 145, 187) |
| HSL | hsl(201, 48%, 50%) |
| OKLCH | oklch(62.5% 0.1 234.8) |
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 #4291BB | 3.50:1 | AA large text | Lc -67.8 | Content text, not long reading |
| Black text on #4291BB | 5.99:1 | AA | Lc 41.7 | Non-text elements, placeholder text |
| #4291BB text on white | 3.50:1 | AA large text | Lc 62.3 | Content text, not long reading |
| #4291BB text on black | 5.99:1 | AA | Lc -39.4 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DDE9
oklch(88.6% 0.027 234)
-
Step 300
300
#A3C6DC
oklch(80.8% 0.049 235.8)
-
Step 400
400
#6FA9CA
oklch(70.7% 0.077 234.4)
-
Step 500
500 (this color)
#4291BB
oklch(62.5% 0.1 234.8)
-
Step 600
600
#1D7CA9
oklch(55.5% 0.108 235.1)
-
Step 700
700
#0A6991
oklch(49.2% 0.1 234.4)
-
Step 800
800
#105676
oklch(42.8% 0.083 234.4)
-
Step 900
900
#18475F
oklch(37.8% 0.065 234.6)
-
Step 950
950
#102A38
oklch(27.2% 0.041 234.6)
#4291BB 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) | #7D90BD | 0.062 |
| Deuteranopia (no green cones) | #6C84BA | 0.052 |
| Tritanopia (no blue cones) | #009C9F | 0.067 |
| Achromatopsia (no color) | #898989 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4291BB
#4291BB
oklch(62.5% 0.1 234.8)
- #B6774A
#B6774A
oklch(62.6% 0.1 55.3)
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 #4291BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.036
- Cool Blue #4984B8 ΔE 0.036
- Blue NCS #118AB2 ΔE 0.037
- Off Blue #5684AE ΔE 0.038
- Steel Blue #4682B4 ΔE 0.042
- Water Blue #0E87CC ΔE 0.051
- Silver Lake Blue #778DA9 ΔE 0.057
Use #4291BB 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.