#019FB4
Closest named color: Sea (#3C9992). oklch(64.4% 0.112 211.2), rgb(1, 159, 180).
Aa
Black text reads best on this color (6.61:1).
About this color
#019FB4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.112 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.050 away. Black text reads best on it, at 6.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.61:1 |
| White text | 3.17:1 |
Values
| HEX | #019FB4 |
| RGB | rgb(1, 159, 180) |
| HSL | hsl(187, 99%, 35%) |
| OKLCH | oklch(64.4% 0.112 211.2) |
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 #019FB4 | 3.17:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #019FB4 | 6.61:1 | AA | Lc 45.8 | Large or bold text, headings |
| #019FB4 text on white | 3.17:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #019FB4 text on black | 6.61:1 | AA | Lc -43.5 | Non-text elements, placeholder text |
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
#DFEDF0
oklch(93.7% 0.015 212)
-
Step 200
200
#C3DFE5
oklch(88.5% 0.031 212.1)
-
Step 300
300
#98CBD5
oklch(81% 0.055 211)
-
Step 400
400
#57AFC0
oklch(70.6% 0.088 211.9)
-
Step 500
500 (this color)
#019FB4
oklch(64.4% 0.112 211.2)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#012C33
oklch(26.9% 0.046 211.3)
#019FB4 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) | #8E99B5 | 0.103 |
| Deuteranopia (no green cones) | #7A8AB4 | 0.094 |
| Tritanopia (no blue cones) | #00A8A5 | 0.040 |
| Achromatopsia (no color) | #909090 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #019FB4
#019FB4
oklch(64.4% 0.112 211.2)
- #C87263
#C87263
oklch(64.4% 0.112 30.9)
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 #019FB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.050
- Teal Green #0A9396 ΔE 0.050
- Cadet Blue #5F9EA0 ΔE 0.052
- Turquoise Blue #06B1C4 ΔE 0.052
- Persian Green #2A9D8F ΔE 0.055
- Blue Green #0F9B8E ΔE 0.056
- Blue NCS #118AB2 ΔE 0.061
- Light Sea Green #20B2AA ΔE 0.064
Use #019FB4 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.