#199CD3
Closest named color: Dark Sky Blue (#448EE4). oklch(65.3% 0.131 233.7), rgb(25, 156, 211).
Aa
Black text reads best on this color (6.73:1).
About this color
#199CD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.131 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.054 away. Black text reads best on it, at 6.73:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.73:1 |
| White text | 3.11:1 |
Values
| HEX | #199CD3 |
| RGB | rgb(25, 156, 211) |
| HSL | hsl(198, 79%, 46%) |
| OKLCH | oklch(65.3% 0.131 233.7) |
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 #199CD3 | 3.11:1 | AA large text | Lc -63.0 | Content text, not long reading |
| Black text on #199CD3 | 6.73:1 | AA | Lc 46.4 | Large or bold text, headings |
| #199CD3 text on white | 3.11:1 | AA large text | Lc 57.7 | Large or bold text, headings |
| #199CD3 text on black | 6.73:1 | AA | Lc -44.1 | 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
#C3DEED
oklch(88.5% 0.035 232.1)
-
Step 300
300
#98C8E4
oklch(80.9% 0.064 234.2)
-
Step 400
400
#59ABD6
oklch(70.7% 0.102 233.6)
-
Step 500
500 (this color)
#199CD3
oklch(65.3% 0.131 233.7)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#022A3D
oklch(26.9% 0.055 234.8)
#199CD3 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) | #819BD6 | 0.082 |
| Deuteranopia (no green cones) | #698BD2 | 0.067 |
| Tritanopia (no blue cones) | #00ABAF | 0.080 |
| Achromatopsia (no color) | #929292 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #199CD3
#199CD3
oklch(65.3% 0.131 233.7)
- #CD773A
#CD773A
oklch(65.3% 0.131 53.3)
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 #199CD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.054
- Chefchaouen Blue #4895EF ΔE 0.057
- Water Blue #0E87CC ΔE 0.060
- Faded Blue #658CBB ΔE 0.064
- Blue NCS #118AB2 ΔE 0.065
- Cornflower Blue #6495ED ΔE 0.069
- Cool Blue #4984B8 ΔE 0.070
- Turquoise Blue #06B1C4 ΔE 0.070
Use #199CD3 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.