#43B9E1
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.7% 0.118 224.6), rgb(67, 185, 225).
Aa
Black text reads best on this color (9.26:1).
About this color
#43B9E1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.118 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.044 away. Black text reads best on it, at 9.26:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.26:1 |
| White text | 2.26:1 |
Values
| HEX | #43B9E1 |
| RGB | rgb(67, 185, 225) |
| HSL | hsl(195, 72%, 57%) |
| OKLCH | oklch(73.7% 0.118 224.6) |
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 #43B9E1 | 2.26:1 | Fails | Lc -49.2 | Large or bold text, headings |
| Black text on #43B9E1 | 9.26:1 | AAA | Lc 59.6 | Large or bold text, headings |
| #43B9E1 text on white | 2.26:1 | Fails | Lc 44.3 | Non-text elements, placeholder text |
| #43B9E1 text on black | 9.26:1 | AAA | Lc -57.8 | 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
#EFF7FA
oklch(97.1% 0.009 222.1)
-
Step 100
100
#DCEDF5
oklch(93.6% 0.021 227.5)
-
Step 200
200
#BDE0EE
oklch(88.6% 0.042 224)
-
Step 300
300
#8CCBE4
oklch(80.8% 0.073 224.8)
-
Step 400
400 (this color)
#43B9E1
oklch(73.7% 0.118 224.6)
-
Step 500
500
#0098BF
oklch(63.2% 0.119 224.4)
-
Step 600
600
#007FA1
oklch(55.5% 0.105 225)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#00495E
oklch(37.7% 0.071 225)
-
Step 950
950
#002B39
oklch(26.9% 0.051 225.5)
#43B9E1 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) | #A3B5E3 | 0.091 |
| Deuteranopia (no green cones) | #8DA5E1 | 0.081 |
| Tritanopia (no blue cones) | #00C5C6 | 0.063 |
| Achromatopsia (no color) | #ACACAC | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43B9E1
#43B9E1
oklch(73.7% 0.118 224.6)
- #E7916A
#E7916A
oklch(73.7% 0.117 44.9)
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 #43B9E1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.044
- Vivid Sky Blue #4CC9F0 ΔE 0.046
- Turquoise Blue #06B1C4 ΔE 0.053
- Bright Sky Blue #02CCFE ΔE 0.057
- Lightblue #7BC8F6 ΔE 0.069
- Dark Turquoise #00CED1 ΔE 0.071
- Carolina Blue #8AB8FE ΔE 0.079
- Sky #82CAFC ΔE 0.081
Use #43B9E1 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.