#109AB5
Closest named color: Blue NCS (#118AB2). oklch(63.3% 0.11 216.5), rgb(16, 154, 181).
Aa
Black text reads best on this color (6.31:1).
About this color
#109AB5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.110 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.047 away. Black text reads best on it, at 6.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.31:1 |
| White text | 3.32:1 |
Values
| HEX | #109AB5 |
| RGB | rgb(16, 154, 181) |
| HSL | hsl(190, 84%, 39%) |
| OKLCH | oklch(63.3% 0.11 216.5) |
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 #109AB5 | 3.32:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #109AB5 | 6.31:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #109AB5 text on white | 3.32:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #109AB5 text on black | 6.31:1 | AA | Lc -41.6 | 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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFEDF1
oklch(93.7% 0.016 216.7)
-
Step 200
200
#C4DFE6
oklch(88.6% 0.03 215.1)
-
Step 300
300
#99CAD7
oklch(80.9% 0.054 215.9)
-
Step 400
400
#5BAEC3
oklch(70.7% 0.086 216.4)
-
Step 500
500 (this color)
#109AB5
oklch(63.3% 0.11 216.5)
-
Step 600
600
#008199
oklch(55.6% 0.099 216.9)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950
#032C35
oklch(27.1% 0.046 216.4)
#109AB5 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) | #8895B6 | 0.096 |
| Deuteranopia (no green cones) | #7487B5 | 0.085 |
| Tritanopia (no blue cones) | #00A3A3 | 0.044 |
| Achromatopsia (no color) | #8D8D8D | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #109AB5
#109AB5
oklch(63.3% 0.11 216.5)
- #C3715A
#C3715A
oklch(63.4% 0.11 36.5)
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 #109AB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.047
- Teal Green #0A9396 ΔE 0.048
- Sea #3C9992 ΔE 0.053
- Teal Blue #01889F ΔE 0.057
- Cadet Blue #5F9EA0 ΔE 0.058
- Persian Green #2A9D8F ΔE 0.062
- Blue Green #0F9B8E ΔE 0.062
- Dusty Blue #5A86AD ΔE 0.065
Use #109AB5 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.