#1BBCE9
Closest named color: Deep Sky Blue (#00BFFF). oklch(74% 0.135 223.8), rgb(27, 188, 233).
Aa
Black text reads best on this color (9.41:1).
About this color
#1BBCE9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.135 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.031 away. Black text reads best on it, at 9.41:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.41:1 |
| White text | 2.23:1 |
Values
| HEX | #1BBCE9 |
| RGB | rgb(27, 188, 233) |
| HSL | hsl(193, 82%, 51%) |
| OKLCH | oklch(74% 0.135 223.8) |
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 #1BBCE9 | 2.23:1 | Fails | Lc -48.1 | Large or bold text, headings |
| Black text on #1BBCE9 | 9.41:1 | AAA | Lc 60.6 | Content text, not long reading |
| #1BBCE9 text on white | 2.23:1 | Fails | Lc 43.4 | Non-text elements, placeholder text |
| #1BBCE9 text on black | 9.41:1 | AAA | Lc -58.8 | Large or bold text, headings |
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
#B9E1F0
oklch(88.6% 0.047 222.6)
-
Step 300
300
#82CDE9
oklch(80.9% 0.084 223.8)
-
Step 400
400 (this color)
#1BBCE9
oklch(74% 0.135 223.8)
-
Step 500
500
#0098BE
oklch(63.1% 0.118 223.7)
-
Step 600
600
#0080A0
oklch(55.7% 0.104 223.4)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
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
#002B39
oklch(26.9% 0.051 225.5)
#1BBCE9 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) | #A3B8EB | 0.105 |
| Deuteranopia (no green cones) | #89A6E9 | 0.091 |
| Tritanopia (no blue cones) | #00CACB | 0.068 |
| Achromatopsia (no color) | #AEAEAE | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1BBCE9
#1BBCE9
oklch(74% 0.135 223.8)
- #F08D61
#F08D61
oklch(74% 0.134 44.2)
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 #1BBCE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.031
- Vivid Sky Blue #4CC9F0 ΔE 0.045
- Bright Sky Blue #02CCFE ΔE 0.047
- Turquoise Blue #06B1C4 ΔE 0.058
- Dark Turquoise #00CED1 ΔE 0.070
- Lightblue #7BC8F6 ΔE 0.074
- Aqua Blue #02D8E9 ΔE 0.079
- Sky #82CAFC ΔE 0.085
Use #1BBCE9 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.