#1D90EB
Closest named color: Dark Sky Blue (#448EE4). oklch(63.9% 0.166 249), rgb(29, 144, 235).
Aa
Black text reads best on this color (6.24:1).
About this color
#1D90EB is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.166 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.022 away. Black text reads best on it, at 6.24:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.24:1 |
| White text | 3.36:1 |
Values
| HEX | #1D90EB |
| RGB | rgb(29, 144, 235) |
| HSL | hsl(207, 84%, 52%) |
| OKLCH | oklch(63.9% 0.166 249) |
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 #1D90EB | 3.36:1 | AA large text | Lc -66.0 | Content text, not long reading |
| Black text on #1D90EB | 6.24:1 | AA | Lc 43.5 | Non-text elements, placeholder text |
| #1D90EB text on white | 3.36:1 | AA large text | Lc 60.5 | Content text, not long reading |
| #1D90EB text on black | 6.24:1 | AA | Lc -41.2 | 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
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C3DCF6
oklch(88.4% 0.045 249.4)
-
Step 300
300
#98C6F3
oklch(81% 0.08 248.3)
-
Step 400
400
#5AA6EE
oklch(70.7% 0.13 249)
-
Step 500
500 (this color)
#1D90EB
oklch(63.9% 0.166 249)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
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
#042846
oklch(27% 0.068 248.6)
#1D90EB 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) | #6396EF | 0.055 |
| Deuteranopia (no green cones) | #4284E9 | 0.034 |
| Tritanopia (no blue cones) | #00A6B2 | 0.120 |
| Achromatopsia (no color) | #8C8C8C | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D90EB
#1D90EB
oklch(63.9% 0.166 249)
- #C17A00
#C17A00
oklch(64% 0.139 69.5)
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 #1D90EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.022
- Dodger Blue #1E90FF ΔE 0.030
- Chefchaouen Blue #4895EF ΔE 0.030
- Water Blue #0E87CC ΔE 0.051
- Soft Blue #6488EA ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.054
- Clear Blue #247AFD ΔE 0.066
- Cool Blue #4984B8 ΔE 0.078
Use #1D90EB 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.