#2A9CFF
Closest named color: Chefchaouen Blue (#4895EF). oklch(68% 0.176 250.1), rgb(42, 156, 255).
Aa
Black text reads best on this color (7.29:1).
About this color
#2A9CFF is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.176 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.029 away. Black text reads best on it, at 7.29:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.29:1 |
| White text | 2.87:1 |
Values
| HEX | #2A9CFF |
| RGB | rgb(42, 156, 255) |
| HSL | hsl(208, 100%, 58%) |
| OKLCH | oklch(68% 0.176 250.1) |
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 #2A9CFF | 2.87:1 | Fails | Lc -59.8 | Large or bold text, headings |
| Black text on #2A9CFF | 7.29:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #2A9CFF text on white | 2.87:1 | Fails | Lc 54.5 | Large or bold text, headings |
| #2A9CFF text on black | 7.29:1 | AAA | Lc -47.4 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF6FF
oklch(97% 0.014 254.6)
-
Step 100
100
#DBECFF
oklch(93.6% 0.032 251.1)
-
Step 200
200
#BDDDFF
oklch(88.5% 0.058 250.1)
-
Step 300
300
#8FC6FF
oklch(81% 0.099 250)
-
Step 400
400 (this color)
#2A9CFF
oklch(68% 0.176 250.1)
-
Step 500
500
#008CF0
oklch(63.1% 0.179 250.1)
-
Step 600
600
#0076CB
oklch(55.7% 0.158 250)
-
Step 700
700
#0063AC
oklch(49.2% 0.139 250)
-
Step 800
800
#00518E
oklch(42.8% 0.121 249.9)
-
Step 900
900
#004377
oklch(37.7% 0.106 249.9)
-
Step 950
950
#00274A
oklch(26.9% 0.077 250.5)
#2A9CFF 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) | #6CA2FF | 0.054 |
| Deuteranopia (no green cones) | #4990FD | 0.033 |
| Tritanopia (no blue cones) | #00B4C1 | 0.128 |
| Achromatopsia (no color) | #989898 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A9CFF
#2A9CFF
oklch(68% 0.176 250.1)
- #D18500
#D18500
oklch(68% 0.147 69.8)
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 #2A9CFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.029
- Dodger Blue #1E90FF ΔE 0.033
- Cornflower Blue #6495ED ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.049
- Soft Blue #6488EA ΔE 0.063
- Clear Blue #247AFD ΔE 0.088
- Periwinkle Blue #8F99FB ΔE 0.090
- Water Blue #0E87CC ΔE 0.091
Use #2A9CFF 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.