#1BC1E4
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75% 0.131 217.6), rgb(27, 193, 228).
Aa
Black text reads best on this color (9.79:1).
About this color
#1BC1E4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.131 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.036 away. Black text reads best on it, at 9.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.79:1 |
| White text | 2.14:1 |
Values
| HEX | #1BC1E4 |
| RGB | rgb(27, 193, 228) |
| HSL | hsl(190, 79%, 50%) |
| OKLCH | oklch(75% 0.131 217.6) |
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 #1BC1E4 | 2.14:1 | Fails | Lc -46.2 | Large or bold text, headings |
| Black text on #1BC1E4 | 9.79:1 | AAA | Lc 62.4 | Content text, not long reading |
| #1BC1E4 text on white | 2.14:1 | Fails | Lc 41.5 | Non-text elements, placeholder text |
| #1BC1E4 text on black | 9.79:1 | AAA | Lc -60.7 | Content text, not long reading |
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 400.
-
Step 50
50
#EEF7FA
oklch(97% 0.01 219.6)
-
Step 100
100
#D9EEF4
oklch(93.5% 0.024 216.7)
-
Step 200
200
#B9E1ED
oklch(88.5% 0.045 217.9)
-
Step 300
300
#81CEE3
oklch(80.9% 0.081 217.1)
-
Step 400
400 (this color)
#1BC1E4
oklch(75% 0.131 217.6)
-
Step 500
500
#0099B6
oklch(63% 0.113 217.6)
-
Step 600
600
#00819A
oklch(55.7% 0.1 217.7)
-
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
#004A59
oklch(37.7% 0.067 217.2)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#1BC1E4 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) | #AABBE6 | 0.112 |
| Deuteranopia (no green cones) | #92A9E4 | 0.101 |
| Tritanopia (no blue cones) | #00CDCC | 0.056 |
| Achromatopsia (no color) | #B1B1B1 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1BC1E4
#1BC1E4
oklch(75% 0.131 217.6)
- #F48F70
#F48F70
oklch(75% 0.131 37.8)
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 #1BC1E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.036
- Deep Sky Blue #00BFFF ΔE 0.042
- Bright Sky Blue #02CCFE ΔE 0.042
- Dark Turquoise #00CED1 ΔE 0.053
- Turquoise Blue #06B1C4 ΔE 0.058
- Aqua Blue #02D8E9 ΔE 0.063
- Medium Turquoise #48D1CC ΔE 0.068
- Lightblue #7BC8F6 ΔE 0.069
Use #1BC1E4 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.