#4091C3
Closest named color: Faded Blue (#658CBB). oklch(62.8% 0.109 239), rgb(64, 145, 195).
Aa
Black text reads best on this color (6.05:1).
About this color
#4091C3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.109 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.035 away. Black text reads best on it, at 6.05:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.05:1 |
| White text | 3.46:1 |
Values
| HEX | #4091C3 |
| RGB | rgb(64, 145, 195) |
| HSL | hsl(203, 52%, 51%) |
| OKLCH | oklch(62.8% 0.109 239) |
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 #4091C3 | 3.46:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #4091C3 | 6.05:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #4091C3 text on white | 3.46:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #4091C3 text on black | 6.05:1 | AA | Lc -39.7 | 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 500.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A2C6E0
oklch(80.9% 0.053 239.7)
-
Step 400
400
#6DA8D0
oklch(70.7% 0.085 239.2)
-
Step 500
500 (this color)
#4091C3
oklch(62.8% 0.109 239)
-
Step 600
600
#177BB0
oklch(55.5% 0.118 239)
-
Step 700
700
#026898
oklch(49.2% 0.11 238.9)
-
Step 800
800
#0C557B
oklch(42.8% 0.091 238.7)
-
Step 900
900
#164663
oklch(37.7% 0.071 239.4)
-
Step 950
950
#0F293A
oklch(26.9% 0.045 240)
#4091C3 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) | #7A91C5 | 0.060 |
| Deuteranopia (no green cones) | #6884C2 | 0.049 |
| Tritanopia (no blue cones) | #009EA2 | 0.076 |
| Achromatopsia (no color) | #8A8A8A | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4091C3
#4091C3
oklch(62.8% 0.109 239)
- #B97740
#B97740
oklch(62.8% 0.109 58.7)
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 #4091C3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.035
- Cool Blue #4984B8 ΔE 0.036
- Dusty Blue #5A86AD ΔE 0.042
- Blue NCS #118AB2 ΔE 0.042
- Off Blue #5684AE ΔE 0.043
- Steel Blue #4682B4 ΔE 0.043
- Water Blue #0E87CC ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.054
Use #4091C3 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.