#2A83CC
Closest named color: Water Blue (#0E87CC). oklch(59.4% 0.138 247.9), rgb(42, 131, 204).
Aa
Black text reads best on this color (5.21:1).
About this color
#2A83CC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.138 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.014 away. Black text reads best on it, at 5.21:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.21:1 |
| White text | 4.02:1 |
Values
| HEX | #2A83CC |
| RGB | rgb(42, 131, 204) |
| HSL | hsl(207, 66%, 48%) |
| OKLCH | oklch(59.4% 0.138 247.9) |
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 #2A83CC | 4.02:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #2A83CC | 5.21:1 | AA | Lc 37.0 | Non-text elements, placeholder text |
| #2A83CC text on white | 4.02:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #2A83CC text on black | 5.21:1 | AA | Lc -34.6 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9EC5EB
oklch(80.8% 0.068 248)
-
Step 400
400
#67A6E1
oklch(70.7% 0.109 248.1)
-
Step 500
500 (this color)
#2A83CC
oklch(59.4% 0.138 247.9)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A7
oklch(49.1% 0.132 247.9)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900
#0F446F
oklch(37.7% 0.091 248.2)
-
Step 950
950
#0C2841
oklch(27% 0.058 248.6)
#2A83CC 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) | #6187CF | 0.051 |
| Deuteranopia (no green cones) | #4978CB | 0.034 |
| Tritanopia (no blue cones) | #00959E | 0.100 |
| Achromatopsia (no color) | #7F7F7F | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A83CC
#2A83CC
oklch(59.4% 0.138 247.9)
- #B06D00
#B06D00
oklch(59.4% 0.13 68.2)
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 #2A83CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.014
- Windows Blue #3778BF ΔE 0.033
- Cool Blue #4984B8 ΔE 0.038
- Steel Blue #4682B4 ΔE 0.040
- Nice Blue #107AB0 ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.050
- Blue NCS #118AB2 ΔE 0.051
- Off Blue #5684AE ΔE 0.057
Use #2A83CC 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.