#00C1EF
Closest named color: Deep Sky Blue (#00BFFF). oklch(75.3% 0.14 223), rgb(0, 193, 239).
Aa
Black text reads best on this color (9.87:1).
About this color
#00C1EF is a medium-light, vivid teal or cyan. In OKLCH its lightness is 75%, its chroma 0.140 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.026 away. Black text reads best on it, at 9.87:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.87:1 |
| White text | 2.12:1 |
Values
| HEX | #00C1EF |
| RGB | rgb(0, 193, 239) |
| HSL | hsl(192, 100%, 47%) |
| OKLCH | oklch(75.3% 0.14 223) |
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 #00C1EF | 2.12:1 | Fails | Lc -45.6 | Large or bold text, headings |
| Black text on #00C1EF | 9.87:1 | AAA | Lc 62.9 | Content text, not long reading |
| #00C1EF text on white | 2.12:1 | Fails | Lc 41.0 | Non-text elements, placeholder text |
| #00C1EF text on black | 9.87:1 | AAA | Lc -61.3 | 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
#EEF7FB
oklch(97.1% 0.011 226)
-
Step 100
100
#D9EEF6
oklch(93.6% 0.025 222.6)
-
Step 200
200
#B7E1F1
oklch(88.5% 0.049 223)
-
Step 300
300
#7ECDEA
oklch(80.8% 0.088 223.5)
-
Step 400
400 (this color)
#00C1EF
oklch(75.3% 0.14 223)
-
Step 500
500
#0098BD
oklch(63.1% 0.118 223.1)
-
Step 600
600
#00809F
oklch(55.6% 0.103 222.6)
-
Step 700
700
#006B86
oklch(49% 0.091 223.1)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#002B38
oklch(26.8% 0.05 223.6)
#00C1EF 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) | #A7BCF1 | 0.111 |
| Deuteranopia (no green cones) | #8CAAEF | 0.096 |
| Tritanopia (no blue cones) | #00CFD0 | 0.069 |
| Achromatopsia (no color) | #B2B2B2 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00C1EF
#00C1EF
oklch(75.3% 0.14 223)
- #F88F63
#F88F63
oklch(75.3% 0.14 43)
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 #00C1EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.026
- Bright Sky Blue #02CCFE ΔE 0.033
- Vivid Sky Blue #4CC9F0 ΔE 0.035
- Dark Turquoise #00CED1 ΔE 0.066
- Lightblue #7BC8F6 ΔE 0.068
- Aqua Blue #02D8E9 ΔE 0.068
- Turquoise Blue #06B1C4 ΔE 0.069
- Sky #82CAFC ΔE 0.078
Use #00C1EF 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.