#2A87B8
Closest named color: Blue NCS (#118AB2). oklch(59.2% 0.113 236.7), rgb(42, 135, 184).
Aa
Black text reads best on this color (5.25:1).
About this color
#2A87B8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.113 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.017 away. Black text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #2A87B8 |
| RGB | rgb(42, 135, 184) |
| HSL | hsl(201, 63%, 44%) |
| OKLCH | oklch(59.2% 0.113 236.7) |
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 #2A87B8 | 3.99:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #2A87B8 | 5.25:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #2A87B8 text on white | 3.99:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #2A87B8 text on black | 5.25:1 | AA | Lc -34.8 | 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
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEA
oklch(88.4% 0.029 238.3)
-
Step 300
300
#A2C6DE
oklch(80.8% 0.051 237.5)
-
Step 400
400
#6EA9CD
oklch(70.8% 0.081 236.3)
-
Step 500
500
#4392C0
oklch(63% 0.104 237.2)
-
Step 600
600 (this color)
#2A87B8
oklch(59.2% 0.113 236.7)
-
Step 700
700
#066894
oklch(49% 0.105 236.9)
-
Step 800
800
#0E5578
oklch(42.6% 0.087 236.8)
-
Step 900
900
#174761
oklch(37.9% 0.067 236.4)
-
Step 950
950
#0F2939
oklch(26.9% 0.044 238.4)
#2A87B8 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) | #6F87BA | 0.064 |
| Deuteranopia (no green cones) | #5C79B7 | 0.054 |
| Tritanopia (no blue cones) | #009498 | 0.073 |
| Achromatopsia (no color) | #7F7F7F | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A87B8
#2A87B8
oklch(59.2% 0.113 236.7)
- #B06B34
#B06B34
oklch(59.3% 0.112 56.7)
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 #2A87B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.017
- Steel Blue #4682B4 ΔE 0.022
- Cool Blue #4984B8 ΔE 0.023
- Water Blue #0E87CC ΔE 0.032
- Off Blue #5684AE ΔE 0.036
- Dusty Blue #5A86AD ΔE 0.041
- Nice Blue #107AB0 ΔE 0.042
- Teal Blue #01889F ΔE 0.044
Use #2A87B8 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.