#1690DD
Closest named color: Dark Sky Blue (#448EE4). oklch(63% 0.151 244.4), rgb(22, 144, 221).
Aa
Black text reads best on this color (6.06:1).
About this color
#1690DD is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.151 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.027 away. Black text reads best on it, at 6.06:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.06:1 |
| White text | 3.46:1 |
Values
| HEX | #1690DD |
| RGB | rgb(22, 144, 221) |
| HSL | hsl(203, 82%, 48%) |
| OKLCH | oklch(63% 0.151 244.4) |
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 #1690DD | 3.46:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #1690DD | 6.06:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #1690DD text on white | 3.46:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #1690DD text on black | 6.06:1 | AA | Lc -40.1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF7
oklch(93.6% 0.021 241.4)
-
Step 200
200
#C3DDF3
oklch(88.5% 0.041 243.7)
-
Step 300
300
#98C6ED
oklch(80.8% 0.074 244.5)
-
Step 400
400
#5BA8E5
oklch(70.8% 0.118 244.5)
-
Step 500
500 (this color)
#1690DD
oklch(63% 0.151 244.4)
-
Step 600
600
#0079BE
oklch(55.6% 0.139 244.6)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950
#042942
oklch(27% 0.061 243.6)
#1690DD 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) | #6B93E0 | 0.063 |
| Deuteranopia (no green cones) | #4F82DC | 0.046 |
| Tritanopia (no blue cones) | #00A3AC | 0.104 |
| Achromatopsia (no color) | #8A8A8A | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1690DD
#1690DD
oklch(63% 0.151 244.4)
- #C37300
#C37300
oklch(63% 0.142 64.1)
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 #1690DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.027
- Water Blue #0E87CC ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.042
- Dodger Blue #1E90FF ΔE 0.052
- Cool Blue #4984B8 ΔE 0.061
- Soft Blue #6488EA ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.063
- Blue NCS #118AB2 ΔE 0.066
Use #1690DD 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.