#0099D8
Closest named color: Dark Sky Blue (#448EE4). oklch(64.7% 0.141 236.7), rgb(0, 153, 216).
Aa
Black text reads best on this color (6.54:1).
About this color
#0099D8 is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.141 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.045 away. Black text reads best on it, at 6.54:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.54:1 |
| White text | 3.20:1 |
Values
| HEX | #0099D8 |
| RGB | rgb(0, 153, 216) |
| HSL | hsl(197, 100%, 42%) |
| OKLCH | oklch(64.7% 0.141 236.7) |
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 #0099D8 | 3.20:1 | AA large text | Lc -64.0 | Content text, not long reading |
| Black text on #0099D8 | 6.54:1 | AA | Lc 45.5 | Large or bold text, headings |
| #0099D8 text on white | 3.20:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #0099D8 text on black | 6.54:1 | 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
#F0F7FB
oklch(97.2% 0.009 232.4)
-
Step 100
100
#DEECF6
oklch(93.6% 0.02 238.7)
-
Step 200
200
#C2DEF0
oklch(88.6% 0.039 236.1)
-
Step 300
300
#96C8E8
oklch(80.9% 0.069 236.8)
-
Step 400
400
#55ABDC
oklch(70.8% 0.11 236.2)
-
Step 500
500 (this color)
#0099D8
oklch(64.7% 0.141 236.7)
-
Step 600
600
#007CB0
oklch(55.5% 0.121 236.7)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950
#012A3F
oklch(27% 0.058 237)
#0099D8 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) | #7A99DB | 0.079 |
| Deuteranopia (no green cones) | #6088D7 | 0.064 |
| Tritanopia (no blue cones) | #00A9AF | 0.088 |
| Achromatopsia (no color) | #909090 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0099D8
#0099D8
oklch(64.7% 0.141 236.7)
- #CD7427
#CD7427
oklch(64.6% 0.141 56.4)
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 #0099D8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.045
- Chefchaouen Blue #4895EF ΔE 0.050
- Water Blue #0E87CC ΔE 0.050
- Blue NCS #118AB2 ΔE 0.064
- Cornflower Blue #6495ED ΔE 0.066
- Faded Blue #658CBB ΔE 0.067
- Cool Blue #4984B8 ΔE 0.068
- Dodger Blue #1E90FF ΔE 0.068
Use #0099D8 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.