#0091DF
Closest named color: Dark Sky Blue (#448EE4). oklch(63.2% 0.154 243.6), rgb(0, 145, 223).
Aa
Black text reads best on this color (6.11:1).
About this color
#0091DF is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.154 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.029 away. Black text reads best on it, at 6.11:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.11:1 |
| White text | 3.43:1 |
Values
| HEX | #0091DF |
| RGB | rgb(0, 145, 223) |
| HSL | hsl(201, 100%, 44%) |
| OKLCH | oklch(63.2% 0.154 243.6) |
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 #0091DF | 3.43:1 | AA large text | Lc -66.6 | Content text, not long reading |
| Black text on #0091DF | 6.11:1 | AA | Lc 42.9 | Non-text elements, placeholder text |
| #0091DF text on white | 3.43:1 | AA large text | Lc 61.1 | Content text, not long reading |
| #0091DF text on black | 6.11:1 | AA | Lc -40.6 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF8
oklch(93.6% 0.022 243.8)
-
Step 200
200
#C2DDF3
oklch(88.5% 0.042 242.7)
-
Step 300
300
#97C7EE
oklch(81% 0.075 243.4)
-
Step 400
400
#57A8E6
oklch(70.6% 0.121 243.9)
-
Step 500
500 (this color)
#0091DF
oklch(63.2% 0.154 243.6)
-
Step 600
600
#007ABC
oklch(55.7% 0.136 243.3)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005383
oklch(42.6% 0.105 243.8)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950
#022943
oklch(27% 0.064 243.6)
#0091DF 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) | #6B94E2 | 0.067 |
| Deuteranopia (no green cones) | #4E83DE | 0.047 |
| Tritanopia (no blue cones) | #00A4AD | 0.106 |
| Achromatopsia (no color) | #8A8A8A | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0091DF
#0091DF
oklch(63.2% 0.154 243.6)
- #C57300
#C57300
oklch(63.2% 0.144 63.3)
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 #0091DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.029
- Water Blue #0E87CC ΔE 0.036
- Chefchaouen Blue #4895EF ΔE 0.043
- Dodger Blue #1E90FF ΔE 0.050
- Soft Blue #6488EA ΔE 0.064
- Cornflower Blue #6495ED ΔE 0.064
- Cool Blue #4984B8 ΔE 0.065
- Blue NCS #118AB2 ΔE 0.068
Use #0091DF 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.