#109BBC
Closest named color: Blue NCS (#118AB2). oklch(63.9% 0.114 220.6), rgb(16, 155, 188).
Aa
Black text reads best on this color (6.43:1).
About this color
#109BBC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.114 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.049 away. Black text reads best on it, at 6.43:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.43:1 |
| White text | 3.26:1 |
Values
| HEX | #109BBC |
| RGB | rgb(16, 155, 188) |
| HSL | hsl(192, 84%, 40%) |
| OKLCH | oklch(63.9% 0.114 220.6) |
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 #109BBC | 3.26:1 | AA large text | Lc -64.8 | Content text, not long reading |
| Black text on #109BBC | 6.43:1 | AA | Lc 44.7 | Non-text elements, placeholder text |
| #109BBC text on white | 3.26:1 | AA large text | Lc 59.4 | Large or bold text, headings |
| #109BBC text on black | 6.43:1 | AA | Lc -42.3 | 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
#C4DEE8
oklch(88.5% 0.031 222.9)
-
Step 300
300
#99CADA
oklch(81% 0.056 219.9)
-
Step 400
400
#5AAEC8
oklch(70.8% 0.09 220.5)
-
Step 500
500 (this color)
#109BBC
oklch(63.9% 0.114 220.6)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#004A5B
oklch(37.8% 0.069 219.8)
-
Step 950
950
#032B36
oklch(26.8% 0.047 221)
#109BBC 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) | #8797BE | 0.094 |
| Deuteranopia (no green cones) | #7288BC | 0.083 |
| Tritanopia (no blue cones) | #00A6A6 | 0.054 |
| Achromatopsia (no color) | #8E8E8E | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #109BBC
#109BBC
oklch(63.9% 0.114 220.6)
- #C67254
#C67254
oklch(63.9% 0.115 40.3)
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 #109BBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.049
- Teal Green #0A9396 ΔE 0.058
- Cadet Blue #5F9EA0 ΔE 0.062
- Turquoise Blue #06B1C4 ΔE 0.062
- Sea #3C9992 ΔE 0.063
- Teal Blue #01889F ΔE 0.064
- Faded Blue #658CBB ΔE 0.064
- Dusty Blue #5A86AD ΔE 0.066
Use #109BBC 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.