#019BD2
Closest named color: Dark Sky Blue (#448EE4). oklch(64.8% 0.133 232.8), rgb(1, 155, 210).
Aa
Black text reads best on this color (6.62:1).
About this color
#019BD2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.133 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.055 away. Black text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.62:1 |
| White text | 3.17:1 |
Values
| HEX | #019BD2 |
| RGB | rgb(1, 155, 210) |
| HSL | hsl(196, 99%, 41%) |
| OKLCH | oklch(64.8% 0.133 232.8) |
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 #019BD2 | 3.17:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #019BD2 | 6.62:1 | AA | Lc 45.9 | Large or bold text, headings |
| #019BD2 text on white | 3.17:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #019BD2 text on black | 6.62:1 | AA | Lc -43.6 | 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
#DEECF5
oklch(93.5% 0.019 235.7)
-
Step 200
200
#C2DEEE
oklch(88.5% 0.037 232.9)
-
Step 300
300
#97C9E4
oklch(81% 0.065 232.2)
-
Step 400
400
#55ACD7
oklch(70.8% 0.105 232.4)
-
Step 500
500 (this color)
#019BD2
oklch(64.8% 0.133 232.8)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#012A3D
oklch(26.9% 0.056 234.3)
#019BD2 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) | #7F9AD5 | 0.084 |
| Deuteranopia (no green cones) | #6789D1 | 0.071 |
| Tritanopia (no blue cones) | #00AAAE | 0.080 |
| Achromatopsia (no color) | #919191 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #019BD2
#019BD2
oklch(64.8% 0.133 232.8)
- #CD7537
#CD7537
oklch(64.9% 0.134 52.9)
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 #019BD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.055
- Water Blue #0E87CC ΔE 0.056
- Chefchaouen Blue #4895EF ΔE 0.059
- Blue NCS #118AB2 ΔE 0.061
- Faded Blue #658CBB ΔE 0.065
- Cool Blue #4984B8 ΔE 0.068
- Turquoise Blue #06B1C4 ΔE 0.073
- Cornflower Blue #6495ED ΔE 0.073
Use #019BD2 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.