#2A87B3
Closest named color: Blue NCS (#118AB2). oklch(59% 0.108 233.8), rgb(42, 135, 179).
Aa
Black text reads best on this color (5.21:1).
About this color
#2A87B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.108 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.012 away. Black text reads best on it, at 5.21:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.21:1 |
| White text | 4.02:1 |
Values
| HEX | #2A87B3 |
| RGB | rgb(42, 135, 179) |
| HSL | hsl(199, 62%, 43%) |
| OKLCH | oklch(59% 0.108 233.8) |
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 #2A87B3 | 4.02:1 | AA large text | Lc -72.7 | Content text, not long reading |
| Black text on #2A87B3 | 5.21:1 | AA | Lc 36.9 | Non-text elements, placeholder text |
| #2A87B3 text on white | 4.02:1 | AA large text | Lc 67.2 | Content text, not long reading |
| #2A87B3 text on black | 5.21:1 | AA | Lc -34.5 | 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 600.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DDE8
oklch(88.6% 0.026 231.7)
-
Step 300
300
#A3C7DB
oklch(81% 0.048 232.5)
-
Step 400
400
#6EA9CA
oklch(70.7% 0.078 233.9)
-
Step 500
500
#4393BC
oklch(63.1% 0.099 233.8)
-
Step 600
600 (this color)
#2A87B3
oklch(59% 0.108 233.8)
-
Step 700
700
#086990
oklch(49.1% 0.1 233.6)
-
Step 800
800
#0F5675
oklch(42.8% 0.083 233.4)
-
Step 900
900
#17475E
oklch(37.7% 0.064 233.1)
-
Step 950
950
#0F2A37
oklch(27.1% 0.041 231.9)
#2A87B3 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) | #7186B5 | 0.067 |
| Deuteranopia (no green cones) | #5F79B2 | 0.056 |
| Tritanopia (no blue cones) | #009396 | 0.067 |
| Achromatopsia (no color) | #7F7F7F | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A87B3
#2A87B3
oklch(59% 0.108 233.8)
- #AE6A3A
#AE6A3A
oklch(58.9% 0.108 54.1)
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 #2A87B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.012
- Steel Blue #4682B4 ΔE 0.023
- Cool Blue #4984B8 ΔE 0.026
- Off Blue #5684AE ΔE 0.035
- Teal Blue #01889F ΔE 0.037
- Dusty Blue #5A86AD ΔE 0.039
- Water Blue #0E87CC ΔE 0.039
- Nice Blue #107AB0 ΔE 0.041
Use #2A87B3 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.