#189DBB
Closest named color: Blue NCS (#118AB2). oklch(64.4% 0.112 218.6), rgb(24, 157, 187).
Aa
Black text reads best on this color (6.57:1).
About this color
#189DBB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.112 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.055 away. Black text reads best on it, at 6.57:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.57:1 |
| White text | 3.19:1 |
Values
| HEX | #189DBB |
| RGB | rgb(24, 157, 187) |
| HSL | hsl(191, 77%, 41%) |
| OKLCH | oklch(64.4% 0.112 218.6) |
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 #189DBB | 3.19:1 | AA large text | Lc -64.0 | Content text, not long reading |
| Black text on #189DBB | 6.57:1 | AA | Lc 45.5 | Large or bold text, headings |
| #189DBB text on white | 3.19:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #189DBB text on black | 6.57:1 | AA | Lc -43.1 | 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
#C4DEE7
oklch(88.4% 0.03 220.6)
-
Step 300
300
#99CAD9
oklch(81% 0.055 218.6)
-
Step 400
400
#5BAEC5
oklch(70.7% 0.087 218.2)
-
Step 500
500 (this color)
#189DBB
oklch(64.4% 0.112 218.6)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#00596B
oklch(42.8% 0.077 217.7)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#032C36
oklch(27.2% 0.047 218.5)
#189DBB 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) | #8A98BD | 0.095 |
| Deuteranopia (no green cones) | #768ABB | 0.084 |
| Tritanopia (no blue cones) | #00A7A7 | 0.049 |
| Achromatopsia (no color) | #909090 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #189DBB
#189DBB
oklch(64.4% 0.112 218.6)
- #C77459
#C77459
oklch(64.4% 0.112 38.7)
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 #189DBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.055
- Turquoise Blue #06B1C4 ΔE 0.056
- Cadet Blue #5F9EA0 ΔE 0.057
- Teal Green #0A9396 ΔE 0.058
- Sea #3C9992 ΔE 0.060
- Faded Blue #658CBB ΔE 0.066
- Persian Green #2A9D8F ΔE 0.067
- Teal Blue #01889F ΔE 0.068
Use #189DBB 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.