#04BACC
Closest named color: Turquoise Blue (#06B1C4). oklch(72.1% 0.123 207.1), rgb(4, 186, 204).
Aa
Black text reads best on this color (8.90:1).
About this color
#04BACC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.123 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.026 away. Black text reads best on it, at 8.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.90:1 |
| White text | 2.35:1 |
Values
| HEX | #04BACC |
| RGB | rgb(4, 186, 204) |
| HSL | hsl(185, 96%, 41%) |
| OKLCH | oklch(72.1% 0.123 207.1) |
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 #04BACC | 2.35:1 | Fails | Lc -50.8 | Large or bold text, headings |
| Black text on #04BACC | 8.90:1 | AAA | Lc 58.1 | Large or bold text, headings |
| #04BACC text on white | 2.35:1 | Fails | Lc 45.9 | Large or bold text, headings |
| #04BACC text on black | 8.90:1 | AAA | Lc -56.2 | 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
#EEF8F9
oklch(97.2% 0.011 204.1)
-
Step 100
100
#DAEEF1
oklch(93.5% 0.022 207.6)
-
Step 200
200
#B9E2E7
oklch(88.5% 0.043 205.5)
-
Step 300
300
#83CFDA
oklch(80.9% 0.077 207.4)
-
Step 400
400 (this color)
#04BACC
oklch(72.1% 0.123 207.1)
-
Step 500
500
#009BAB
oklch(63% 0.108 207.7)
-
Step 600
600
#008390
oklch(55.7% 0.096 207)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#005A63
oklch(42.7% 0.073 206.6)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#04BACC 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) | #A8B2CD | 0.119 |
| Deuteranopia (no green cones) | #92A2CC | 0.109 |
| Tritanopia (no blue cones) | #00C3BF | 0.037 |
| Achromatopsia (no color) | #A9A9A9 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04BACC
#04BACC
oklch(72.1% 0.123 207.1)
- #E8857A
#E8857A
oklch(72.1% 0.123 27.2)
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 #04BACC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.026
- Topaz #13BBAF ΔE 0.044
- Light Sea Green #20B2AA ΔE 0.049
- Dark Turquoise #00CED1 ΔE 0.056
- Vivid Sky Blue #4CC9F0 ΔE 0.069
- Medium Turquoise #48D1CC ΔE 0.073
- Deep Sky Blue #00BFFF ΔE 0.074
- Greeny Blue #42B395 ΔE 0.076
Use #04BACC 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.