#199FD1
Closest named color: Turquoise Blue (#06B1C4). oklch(65.9% 0.127 230.6), rgb(25, 159, 209).
Aa
Black text reads best on this color (6.92:1).
About this color
#199FD1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.127 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.061 away. Black text reads best on it, at 6.92:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 6.92:1 |
| White text | 3.03:1 |
Values
| HEX | #199FD1 |
| RGB | rgb(25, 159, 209) |
| HSL | hsl(196, 79%, 46%) |
| OKLCH | oklch(65.9% 0.127 230.6) |
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 #199FD1 | 3.03:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #199FD1 | 6.92:1 | AA | Lc 47.5 | Large or bold text, headings |
| #199FD1 text on white | 3.03:1 | AA large text | Lc 56.6 | Large or bold text, headings |
| #199FD1 text on black | 6.92:1 | AA | Lc -45.2 | 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 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
#98C9E2
oklch(81% 0.062 230.6)
-
Step 400
400
#58ACD3
oklch(70.7% 0.099 230.5)
-
Step 500
500 (this color)
#199FD1
oklch(65.9% 0.127 230.6)
-
Step 600
600
#007EA8
oklch(55.6% 0.112 230.6)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#005775
oklch(42.8% 0.086 230.3)
-
Step 900
900
#004862
oklch(37.7% 0.076 230.8)
-
Step 950
950
#022B3B
oklch(27.1% 0.052 229.7)
#199FD1 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) | #859DD3 | 0.085 |
| Deuteranopia (no green cones) | #6E8DD0 | 0.072 |
| Tritanopia (no blue cones) | #00ADB0 | 0.074 |
| Achromatopsia (no color) | #949494 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #199FD1
#199FD1
oklch(65.9% 0.127 230.6)
- #CF7944
#CF7944
oklch(66% 0.127 50.6)
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 #199FD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.063
- Chefchaouen Blue #4895EF ΔE 0.063
- Faded Blue #658CBB ΔE 0.067
- Water Blue #0E87CC ΔE 0.068
- Blue NCS #118AB2 ΔE 0.069
- Cornflower Blue #6495ED ΔE 0.074
- Cool Blue #4984B8 ΔE 0.076
Use #199FD1 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.