#2A90DB
Closest named color: Dark Sky Blue (#448EE4). oklch(63.2% 0.144 245.8), rgb(42, 144, 219).
Aa
Black text reads best on this color (6.11:1).
About this color
#2A90DB is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.144 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.023 away. Black text reads best on it, at 6.11:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.11:1 |
| White text | 3.43:1 |
Values
| HEX | #2A90DB |
| RGB | rgb(42, 144, 219) |
| HSL | hsl(205, 71%, 51%) |
| OKLCH | oklch(63.2% 0.144 245.8) |
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 #2A90DB | 3.43:1 | AA large text | Lc -66.9 | Content text, not long reading |
| Black text on #2A90DB | 6.11:1 | AA | Lc 42.6 | Non-text elements, placeholder text |
| #2A90DB text on white | 3.43:1 | AA large text | Lc 61.4 | Content text, not long reading |
| #2A90DB text on black | 6.11:1 | AA | Lc -40.3 | 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
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9BC6EC
oklch(80.9% 0.071 245.5)
-
Step 400
400
#61A7E3
oklch(70.7% 0.113 246.2)
-
Step 500
500 (this color)
#2A90DB
oklch(63.2% 0.144 245.8)
-
Step 600
600
#0078C0
oklch(55.5% 0.142 245.8)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#044570
oklch(37.8% 0.094 245.6)
-
Step 950
950
#082942
oklch(27.2% 0.06 245.7)
#2A90DB 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) | #6D93DE | 0.058 |
| Deuteranopia (no green cones) | #5383DA | 0.042 |
| Tritanopia (no blue cones) | #00A2AB | 0.102 |
| Achromatopsia (no color) | #8A8A8A | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A90DB
#2A90DB
oklch(63.2% 0.144 245.8)
- #C27500
#C27500
oklch(63.2% 0.141 65.8)
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 #2A90DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.023
- Water Blue #0E87CC ΔE 0.035
- Chefchaouen Blue #4895EF ΔE 0.039
- Dodger Blue #1E90FF ΔE 0.054
- Cool Blue #4984B8 ΔE 0.057
- Soft Blue #6488EA ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.057
- Faded Blue #658CBB ΔE 0.063
Use #2A90DB 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.