#2487B0
Closest named color: Blue NCS (#118AB2). oklch(58.7% 0.107 231), rgb(36, 135, 176).
Aa
Black text reads best on this color (5.16:1).
About this color
#2487B0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.107 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.009 away. Black text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.16:1 |
| White text | 4.06:1 |
Values
| HEX | #2487B0 |
| RGB | rgb(36, 135, 176) |
| HSL | hsl(198, 66%, 42%) |
| OKLCH | oklch(58.7% 0.107 231) |
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 #2487B0 | 4.06:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #2487B0 | 5.16:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #2487B0 text on white | 4.06:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #2487B0 text on black | 5.16:1 | AA | Lc -34.2 | 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
#C8DDE8
oklch(88.5% 0.027 230.4)
-
Step 300
300
#A2C7DA
oklch(80.9% 0.048 230.4)
-
Step 400
400
#6DAAC8
oklch(70.8% 0.077 230.6)
-
Step 500
500
#4194BA
oklch(63.1% 0.098 231)
-
Step 600
600 (this color)
#2487B0
oklch(58.7% 0.107 231)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#0A5674
oklch(42.6% 0.083 231.8)
-
Step 900
900
#15475D
oklch(37.6% 0.064 231.2)
-
Step 950
950
#0F2A37
oklch(27.1% 0.041 231.9)
#2487B0 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) | #7285B2 | 0.072 |
| Deuteranopia (no green cones) | #6078AF | 0.062 |
| Tritanopia (no blue cones) | #009295 | 0.062 |
| Achromatopsia (no color) | #7E7E7E | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2487B0
#2487B0
oklch(58.7% 0.107 231)
- #AE683D
#AE683D
oklch(58.6% 0.107 50.9)
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 #2487B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.009
- Steel Blue #4682B4 ΔE 0.027
- Teal Blue #01889F ΔE 0.031
- Cool Blue #4984B8 ΔE 0.031
- Off Blue #5684AE ΔE 0.038
- Nice Blue #107AB0 ΔE 0.041
- Cerulean #457B9D ΔE 0.041
- Dusty Blue #5A86AD ΔE 0.042
Use #2487B0 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.