#1D90E2
Closest named color: Dark Sky Blue (#448EE4). oklch(63.4% 0.155 246.5), rgb(29, 144, 226).
Aa
Black text reads best on this color (6.13:1).
About this color
#1D90E2 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.155 and its hue 247°. 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 6.13:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.13:1 |
| White text | 3.42:1 |
Values
| HEX | #1D90E2 |
| RGB | rgb(29, 144, 226) |
| HSL | hsl(205, 77%, 50%) |
| OKLCH | oklch(63.4% 0.155 246.5) |
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 #1D90E2 | 3.42:1 | AA large text | Lc -66.6 | Content text, not long reading |
| Black text on #1D90E2 | 6.13:1 | AA | Lc 42.9 | Non-text elements, placeholder text |
| #1D90E2 text on white | 3.42:1 | AA large text | Lc 61.2 | Content text, not long reading |
| #1D90E2 text on black | 6.13:1 | AA | Lc -40.5 | 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
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C3DDF4
oklch(88.6% 0.042 245)
-
Step 300
300
#99C6EF
oklch(80.9% 0.075 246.4)
-
Step 400
400
#5CA7E8
oklch(70.7% 0.122 246.7)
-
Step 500
500 (this color)
#1D90E2
oklch(63.4% 0.155 246.5)
-
Step 600
600
#0078C2
oklch(55.6% 0.145 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#004472
oklch(37.6% 0.099 246.8)
-
Step 950
950
#052844
oklch(26.9% 0.065 247.5)
#1D90E2 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) | #6894E5 | 0.058 |
| Deuteranopia (no green cones) | #4B83E0 | 0.040 |
| Tritanopia (no blue cones) | #00A4AE | 0.110 |
| Achromatopsia (no color) | #8B8B8B | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D90E2
#1D90E2
oklch(63.4% 0.155 246.5)
- #C27600
#C27600
oklch(63.4% 0.141 66.4)
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 #1D90E2, 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
- Chefchaouen Blue #4895EF ΔE 0.036
- Water Blue #0E87CC ΔE 0.040
- Dodger Blue #1E90FF ΔE 0.044
- Soft Blue #6488EA ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.058
- Cool Blue #4984B8 ΔE 0.066
- Steel Blue #4682B4 ΔE 0.073
Use #1D90E2 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.