#1C91EE
Closest named color: Dark Sky Blue (#448EE4). oklch(64.3% 0.169 249.2), rgb(28, 145, 238).
Aa
Black text reads best on this color (6.33:1).
About this color
#1C91EE is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.169 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.024 away. Black text reads best on it, at 6.33:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.33:1 |
| White text | 3.31:1 |
Values
| HEX | #1C91EE |
| RGB | rgb(28, 145, 238) |
| HSL | hsl(207, 86%, 52%) |
| OKLCH | oklch(64.3% 0.169 249.2) |
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 #1C91EE | 3.31:1 | AA large text | Lc -65.4 | Content text, not long reading |
| Black text on #1C91EE | 6.33:1 | AA | Lc 44.1 | Non-text elements, placeholder text |
| #1C91EE text on white | 3.31:1 | AA large text | Lc 60.0 | Large or bold text, headings |
| #1C91EE text on black | 6.33:1 | AA | Lc -41.8 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECFA
oklch(93.7% 0.024 248.1)
-
Step 200
200
#C3DCF7
oklch(88.5% 0.046 250.4)
-
Step 300
300
#97C5F4
oklch(80.8% 0.083 249.4)
-
Step 400
400
#59A6EF
oklch(70.7% 0.132 249.1)
-
Step 500
500 (this color)
#1C91EE
oklch(64.3% 0.169 249.2)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950
#042847
oklch(27.1% 0.07 249.3)
#1C91EE 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) | #6397F2 | 0.054 |
| Deuteranopia (no green cones) | #4185EC | 0.033 |
| Tritanopia (no blue cones) | #00A7B4 | 0.121 |
| Achromatopsia (no color) | #8D8D8D | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C91EE
#1C91EE
oklch(64.3% 0.169 249.2)
- #C37B00
#C37B00
oklch(64.4% 0.14 69.3)
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 #1C91EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.024
- Dodger Blue #1E90FF ΔE 0.026
- Chefchaouen Blue #4895EF ΔE 0.028
- Soft Blue #6488EA ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.053
- Water Blue #0E87CC ΔE 0.056
- Clear Blue #247AFD ΔE 0.066
- Cornflower #6A79F7 ΔE 0.081
Use #1C91EE 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.