#019BCB
Closest named color: Blue NCS (#118AB2). oklch(64.5% 0.127 229.2), rgb(1, 155, 203).
Aa
Black text reads best on this color (6.55:1).
About this color
#019BCB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.127 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.055 away. Black text reads best on it, at 6.55:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.55:1 |
| White text | 3.20:1 |
Values
| HEX | #019BCB |
| RGB | rgb(1, 155, 203) |
| HSL | hsl(194, 99%, 40%) |
| OKLCH | oklch(64.5% 0.127 229.2) |
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 #019BCB | 3.20:1 | AA large text | Lc -64.0 | Content text, not long reading |
| Black text on #019BCB | 6.55:1 | AA | Lc 45.5 | Large or bold text, headings |
| #019BCB text on white | 3.20:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #019BCB text on black | 6.55:1 | AA | Lc -43.1 | 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
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEECF4
oklch(93.5% 0.018 232.5)
-
Step 200
200
#C3DEEC
oklch(88.5% 0.035 230.3)
-
Step 300
300
#97C9E1
oklch(80.9% 0.062 229.1)
-
Step 400
400
#56ACD2
oklch(70.6% 0.1 229.3)
-
Step 500
500 (this color)
#019BCB
oklch(64.5% 0.127 229.2)
-
Step 600
600
#007EA6
oklch(55.5% 0.11 229.3)
-
Step 700
700
#006A8C
oklch(49% 0.097 229.1)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#004861
oklch(37.6% 0.075 229.8)
-
Step 950
950
#012B3B
oklch(27.1% 0.053 229.3)
#019BCB 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) | #8299CD | 0.088 |
| Deuteranopia (no green cones) | #6B89CA | 0.075 |
| Tritanopia (no blue cones) | #00A8AB | 0.070 |
| Achromatopsia (no color) | #909090 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #019BCB
#019BCB
oklch(64.5% 0.127 229.2)
- #CB7441
#CB7441
oklch(64.6% 0.128 49.4)
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 #019BCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.055
- Water Blue #0E87CC ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.063
- Faded Blue #658CBB ΔE 0.063
- Cool Blue #4984B8 ΔE 0.066
- Turquoise Blue #06B1C4 ΔE 0.068
- Chefchaouen Blue #4895EF ΔE 0.069
- Steel Blue #4682B4 ΔE 0.071
Use #019BCB 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.