#2A87C4
Closest named color: Water Blue (#0E87CC). oklch(59.9% 0.126 242.5), rgb(42, 135, 196).
Aa
Black text reads best on this color (5.36:1).
About this color
#2A87C4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.126 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.015 away. Black text reads best on it, at 5.36:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.36:1 |
| White text | 3.91:1 |
Values
| HEX | #2A87C4 |
| RGB | rgb(42, 135, 196) |
| HSL | hsl(204, 65%, 47%) |
| OKLCH | oklch(59.9% 0.126 242.5) |
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 #2A87C4 | 3.91:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #2A87C4 | 5.36:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #2A87C4 text on white | 3.91:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #2A87C4 text on black | 5.36:1 | AA | Lc -35.5 | 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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DCEE
oklch(88.4% 0.034 242.7)
-
Step 300
300
#9FC6E6
oklch(80.9% 0.062 243.3)
-
Step 400
400
#67A8D9
oklch(70.7% 0.098 242.5)
-
Step 500
500 (this color)
#2A87C4
oklch(59.9% 0.126 242.5)
-
Step 600
600
#007ABA
oklch(55.6% 0.133 242.5)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#0E4669
oklch(37.8% 0.081 242)
-
Step 950
950
#0B293E
oklch(27% 0.053 242.9)
#2A87C4 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) | #6A88C7 | 0.058 |
| Deuteranopia (no green cones) | #557AC3 | 0.046 |
| Tritanopia (no blue cones) | #00969D | 0.086 |
| Achromatopsia (no color) | #818181 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A87C4
#2A87C4
oklch(59.9% 0.126 242.5)
- #B46C1E
#B46C1E
oklch(59.8% 0.126 62.1)
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 #2A87C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.015
- Cool Blue #4984B8 ΔE 0.026
- Steel Blue #4682B4 ΔE 0.029
- Blue NCS #118AB2 ΔE 0.034
- Windows Blue #3778BF ΔE 0.041
- Off Blue #5684AE ΔE 0.044
- Nice Blue #107AB0 ΔE 0.048
- Dusty Blue #5A86AD ΔE 0.049
Use #2A87C4 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.