#4091B0
Closest named color: Blue NCS (#118AB2). oklch(61.9% 0.091 226.3), rgb(64, 145, 176).
Aa
Black text reads best on this color (5.89:1).
About this color
#4091B0 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 62%, its chroma 0.091 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.034 away. Black text reads best on it, at 5.89:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.89:1 |
| White text | 3.56:1 |
Values
| HEX | #4091B0 |
| RGB | rgb(64, 145, 176) |
| HSL | hsl(197, 47%, 47%) |
| OKLCH | oklch(61.9% 0.091 226.3) |
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 #4091B0 | 3.56:1 | AA large text | Lc -68.5 | Content text, not long reading |
| Black text on #4091B0 | 5.89:1 | AA | Lc 41.1 | Non-text elements, placeholder text |
| #4091B0 text on white | 3.56:1 | AA large text | Lc 63.0 | Content text, not long reading |
| #4091B0 text on black | 5.89:1 | AA | Lc -38.7 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A3C7D7
oklch(80.9% 0.045 226.7)
-
Step 400
400
#6FAAC3
oklch(70.7% 0.071 226.6)
-
Step 500
500 (this color)
#4091B0
oklch(61.9% 0.091 226.3)
-
Step 600
600
#1C7EA0
oklch(55.5% 0.099 227.1)
-
Step 700
700
#086B89
oklch(49.2% 0.092 226.3)
-
Step 800
800
#0F576F
oklch(42.7% 0.076 226.4)
-
Step 900
900
#17485A
oklch(37.8% 0.06 226.2)
-
Step 950
950
#102A35
oklch(27% 0.038 228.2)
#4091B0 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) | #808EB2 | 0.068 |
| Deuteranopia (no green cones) | #7083B0 | 0.059 |
| Tritanopia (no blue cones) | #009A9B | 0.054 |
| Achromatopsia (no color) | #888888 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4091B0
#4091B0
oklch(61.9% 0.091 226.3)
- #B37456
#B37456
oklch(61.8% 0.091 46.1)
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 #4091B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.036
- Off Blue #5684AE ΔE 0.039
- Cool Blue #4984B8 ΔE 0.043
- Faded Blue #658CBB ΔE 0.043
- Steel Blue #4682B4 ΔE 0.046
- Teal Blue #01889F ΔE 0.048
- Teal Green #0A9396 ΔE 0.052
Use #4091B0 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.