#4091CB
Closest named color: Faded Blue (#658CBB). oklch(63.2% 0.118 243), rgb(64, 145, 203).
Aa
Black text reads best on this color (6.13:1).
About this color
#4091CB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.118 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.039 away. Black text reads best on it, at 6.13:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.13:1 |
| White text | 3.42:1 |
Values
| HEX | #4091CB |
| RGB | rgb(64, 145, 203) |
| HSL | hsl(205, 57%, 52%) |
| OKLCH | oklch(63.2% 0.118 243) |
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 #4091CB | 3.42:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #4091CB | 6.13:1 | AA | Lc 42.6 | Non-text elements, placeholder text |
| #4091CB text on white | 3.42:1 | AA large text | Lc 61.5 | Content text, not long reading |
| #4091CB text on black | 6.13:1 | AA | Lc -40.2 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A1C6E3
oklch(80.9% 0.057 242)
-
Step 400
400
#6CA7D6
oklch(70.6% 0.093 243.7)
-
Step 500
500 (this color)
#4091CB
oklch(63.2% 0.118 243)
-
Step 600
600
#147AB7
oklch(55.6% 0.127 242.6)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#0A5480
oklch(42.8% 0.098 242.6)
-
Step 900
900
#154567
oklch(37.6% 0.077 243.7)
-
Step 950
950
#0E293C
oklch(27% 0.048 242.2)
#4091CB 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) | #7792CE | 0.056 |
| Deuteranopia (no green cones) | #6485CA | 0.044 |
| Tritanopia (no blue cones) | #009FA5 | 0.084 |
| Achromatopsia (no color) | #8B8B8B | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4091CB
#4091CB
oklch(63.2% 0.118 243)
- #BB7834
#BB7834
oklch(63.1% 0.118 62.9)
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 #4091CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.039
- Cool Blue #4984B8 ΔE 0.041
- Water Blue #0E87CC ΔE 0.041
- Dark Sky Blue #448EE4 ΔE 0.041
- Steel Blue #4682B4 ΔE 0.048
- Dusty Blue #5A86AD ΔE 0.050
- Blue NCS #118AB2 ΔE 0.050
- Off Blue #5684AE ΔE 0.050
Use #4091CB 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.