#188CB7
Closest named color: Blue NCS (#118AB2). oklch(60.1% 0.114 230), rgb(24, 140, 183).
Aa
Black text reads best on this color (5.47:1).
About this color
#188CB7 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.114 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.009 away. Black text reads best on it, at 5.47:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.47:1 |
| White text | 3.83:1 |
Values
| HEX | #188CB7 |
| RGB | rgb(24, 140, 183) |
| HSL | hsl(196, 77%, 41%) |
| OKLCH | oklch(60.1% 0.114 230) |
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 #188CB7 | 3.83:1 | AA large text | Lc -70.9 | Content text, not long reading |
| Black text on #188CB7 | 5.47:1 | AA | Lc 38.7 | Non-text elements, placeholder text |
| #188CB7 text on white | 3.83:1 | AA large text | Lc 65.4 | Content text, not long reading |
| #188CB7 text on black | 5.47:1 | AA | Lc -36.3 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C5DDEA
oklch(88.4% 0.031 231.3)
-
Step 300
300
#9CC8DE
oklch(80.9% 0.056 229.9)
-
Step 400
400
#61ABCE
oklch(70.7% 0.09 230.3)
-
Step 500
500 (this color)
#188CB7
oklch(60.1% 0.114 230)
-
Step 600
600
#007EA7
oklch(55.5% 0.111 230)
-
Step 700
700
#006A8D
oklch(49.1% 0.098 229.8)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#024861
oklch(37.6% 0.074 230.1)
-
Step 950
950
#072A39
oklch(26.9% 0.048 231)
#188CB7 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) | #768AB9 | 0.078 |
| Deuteranopia (no green cones) | #627CB6 | 0.067 |
| Tritanopia (no blue cones) | #00989A | 0.066 |
| Achromatopsia (no color) | #828282 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #188CB7
#188CB7
oklch(60.1% 0.114 230)
- #B66A3D
#B66A3D
oklch(60% 0.114 49.8)
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 #188CB7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.009
- Cool Blue #4984B8 ΔE 0.035
- Steel Blue #4682B4 ΔE 0.035
- Teal Blue #01889F ΔE 0.038
- Water Blue #0E87CC ΔE 0.039
- Off Blue #5684AE ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.046
- Nice Blue #107AB0 ΔE 0.053
Use #188CB7 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.