#2A7CBD
Closest named color: Windows Blue (#3778BF). oklch(56.9% 0.127 246.8), rgb(42, 124, 189).
Aa
Black text reads best on this color (4.71:1).
About this color
#2A7CBD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.127 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.014 away. Black text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #2A7CBD |
| RGB | rgb(42, 124, 189) |
| HSL | hsl(207, 64%, 45%) |
| OKLCH | oklch(56.9% 0.127 246.8) |
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 #2A7CBD | 4.45:1 | AA large text | Lc -76.0 | Fine for body text |
| Black text on #2A7CBD | 4.71:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #2A7CBD text on white | 4.45:1 | AA large text | Lc 70.5 | Content text, not long reading |
| #2A7CBD text on black | 4.71:1 | AA | Lc -31.1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A3C5E4
oklch(80.9% 0.057 246.1)
-
Step 400
400
#70A6D7
oklch(70.7% 0.092 246.9)
-
Step 500
500
#488FCC
oklch(63.1% 0.117 246.9)
-
Step 600
600 (this color)
#2A7CBD
oklch(56.9% 0.127 246.8)
-
Step 700
700
#16659F
oklch(49.2% 0.117 246.5)
-
Step 800
800
#165281
oklch(42.6% 0.098 247)
-
Step 900
900
#1A4568
oklch(37.8% 0.076 246.4)
-
Step 950
950
#11283D
oklch(26.9% 0.049 248.1)
#2A7CBD 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) | #5E7FC0 | 0.049 |
| Deuteranopia (no green cones) | #4971BC | 0.036 |
| Tritanopia (no blue cones) | #008C94 | 0.091 |
| Achromatopsia (no color) | #777777 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A7CBD
#2A7CBD
oklch(56.9% 0.127 246.8)
- #A76600
#A76600
oklch(56.9% 0.125 67.3)
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 #2A7CBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.014
- Nice Blue #107AB0 ΔE 0.025
- Steel Blue #4682B4 ΔE 0.034
- Water Blue #0E87CC ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.037
- Blue NCS #118AB2 ΔE 0.048
- French Blue #436BAD ΔE 0.049
Use #2A7CBD 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.