#2099CF
Closest named color: Dark Sky Blue (#448EE4). oklch(64.5% 0.127 234.3), rgb(32, 153, 207).
Aa
Black text reads best on this color (6.51:1).
About this color
#2099CF is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.127 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.052 away. Black text reads best on it, at 6.51:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.51:1 |
| White text | 3.22:1 |
Values
| HEX | #2099CF |
| RGB | rgb(32, 153, 207) |
| HSL | hsl(199, 73%, 47%) |
| OKLCH | oklch(64.5% 0.127 234.3) |
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 #2099CF | 3.22:1 | AA large text | Lc -64.4 | Content text, not long reading |
| Black text on #2099CF | 6.51:1 | AA | Lc 45.1 | Large or bold text, headings |
| #2099CF text on white | 3.22:1 | AA large text | Lc 59.0 | Large or bold text, headings |
| #2099CF text on black | 6.51:1 | AA | Lc -42.8 | 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
#F0F6FA
oklch(97% 0.008 236.6)
-
Step 100
100
#DFECF4
oklch(93.6% 0.018 234.5)
-
Step 200
200
#C4DDED
oklch(88.4% 0.035 235.9)
-
Step 300
300
#99C8E3
oklch(80.9% 0.062 233.7)
-
Step 400
400
#5CABD5
oklch(70.7% 0.099 233.8)
-
Step 500
500 (this color)
#2099CF
oklch(64.5% 0.127 234.3)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004865
oklch(37.8% 0.079 233.7)
-
Step 950
950
#042A3C
oklch(26.9% 0.053 234.4)
#2099CF 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) | #7E98D1 | 0.078 |
| Deuteranopia (no green cones) | #6888CE | 0.066 |
| Tritanopia (no blue cones) | #00A7AC | 0.077 |
| Achromatopsia (no color) | #8F8F8F | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2099CF
#2099CF
oklch(64.5% 0.127 234.3)
- #C8763A
#C8763A
oklch(64.5% 0.127 54.3)
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 #2099CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.052
- Water Blue #0E87CC ΔE 0.052
- Blue NCS #118AB2 ΔE 0.057
- Faded Blue #658CBB ΔE 0.058
- Chefchaouen Blue #4895EF ΔE 0.058
- Cool Blue #4984B8 ΔE 0.061
- Steel Blue #4682B4 ΔE 0.067
- Dusty Blue #5A86AD ΔE 0.068
Use #2099CF 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.