#04A4BC
Closest named color: Turquoise Blue (#06B1C4). oklch(66% 0.115 212.9), rgb(4, 164, 188).
Aa
Black text reads best on this color (7.04:1).
About this color
#04A4BC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.115 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.037 away. Black text reads best on it, at 7.04:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.04:1 |
| White text | 2.98:1 |
Values
| HEX | #04A4BC |
| RGB | rgb(4, 164, 188) |
| HSL | hsl(188, 96%, 38%) |
| OKLCH | oklch(66% 0.115 212.9) |
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 #04A4BC | 2.98:1 | Fails | Lc -61.2 | Content text, not long reading |
| Black text on #04A4BC | 7.04:1 | AAA | Lc 48.2 | Large or bold text, headings |
| #04A4BC text on white | 2.98:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #04A4BC text on black | 7.04:1 | AAA | Lc -46.0 | 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 500.
-
Step 50
50
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DEEDF0
oklch(93.6% 0.016 211)
-
Step 200
200
#C3DFE5
oklch(88.5% 0.031 212.1)
-
Step 300
300
#97CBD6
oklch(81% 0.056 212.1)
-
Step 400
400
#55AFC2
oklch(70.6% 0.09 213.4)
-
Step 500
500 (this color)
#04A4BC
oklch(66% 0.115 212.9)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#004A56
oklch(37.6% 0.066 213)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#04A4BC 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) | #929EBD | 0.104 |
| Deuteranopia (no green cones) | #7D8FBC | 0.094 |
| Tritanopia (no blue cones) | #00ADAB | 0.042 |
| Achromatopsia (no color) | #959595 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04A4BC
#04A4BC
oklch(66% 0.115 212.9)
- #CF7664
#CF7664
oklch(66% 0.116 32.4)
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 #04A4BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.037
- Cadet Blue #5F9EA0 ΔE 0.055
- Light Sea Green #20B2AA ΔE 0.057
- Sea #3C9992 ΔE 0.061
- Persian Green #2A9D8F ΔE 0.065
- Teal Green #0A9396 ΔE 0.066
- Blue Green #0F9B8E ΔE 0.068
- Greyblue #77A1B5 ΔE 0.069
Use #04A4BC 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.