#04B5BC
Closest named color: Turquoise Blue (#06B1C4). oklch(70.3% 0.119 199.7), rgb(4, 181, 188).
Aa
Black text reads best on this color (8.34:1).
About this color
#04B5BC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.119 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.019 away. Black text reads best on it, at 8.34:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.34:1 |
| White text | 2.51:1 |
Values
| HEX | #04B5BC |
| RGB | rgb(4, 181, 188) |
| HSL | hsl(182, 96%, 38%) |
| OKLCH | oklch(70.3% 0.119 199.7) |
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 #04B5BC | 2.51:1 | Fails | Lc -53.8 | Large or bold text, headings |
| Black text on #04B5BC | 8.34:1 | AAA | Lc 55.3 | Large or bold text, headings |
| #04B5BC text on white | 2.51:1 | Fails | Lc 48.7 | Large or bold text, headings |
| #04B5BC text on black | 8.34:1 | AAA | Lc -53.2 | 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
#EEF8F8
oklch(97.2% 0.011 197)
-
Step 100
100
#DAEFEF
oklch(93.7% 0.022 196.8)
-
Step 200
200
#BAE2E4
oklch(88.5% 0.042 200.2)
-
Step 300
300
#85D0D3
oklch(81% 0.075 199)
-
Step 400
400 (this color)
#04B5BC
oklch(70.3% 0.119 199.7)
-
Step 500
500
#009DA3
oklch(63.2% 0.108 199.6)
-
Step 600
600
#008489
oklch(55.7% 0.095 199.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4F
oklch(37.8% 0.064 199.4)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#04B5BC 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) | #A6ACBD | 0.121 |
| Deuteranopia (no green cones) | #919DBD | 0.112 |
| Tritanopia (no blue cones) | #00BCB7 | 0.024 |
| Achromatopsia (no color) | #A3A3A3 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04B5BC
#04B5BC
oklch(70.3% 0.119 199.7)
- #E07F81
#E07F81
oklch(70.3% 0.12 19.3)
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 #04B5BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.019
- Light Sea Green #20B2AA ΔE 0.025
- Topaz #13BBAF ΔE 0.030
- Greeny Blue #42B395 ΔE 0.056
- Cadet Blue #5F9EA0 ΔE 0.070
- Dark Turquoise #00CED1 ΔE 0.071
- Greyblue #77A1B5 ΔE 0.078
- Dull Teal #5F9E8F ΔE 0.079
Use #04B5BC 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.