#2A7CB1
Closest named color: Nice Blue (#107AB0). oklch(56.2% 0.113 241.6), rgb(42, 124, 177).
Aa
Black text reads best on this color (4.61:1).
About this color
#2A7CB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.113 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.014 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #2A7CB1 |
| RGB | rgb(42, 124, 177) |
| HSL | hsl(204, 62%, 43%) |
| OKLCH | oklch(56.2% 0.113 241.6) |
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 #2A7CB1 | 4.54:1 | AA | Lc -76.7 | Fine for body text |
| Black text on #2A7CB1 | 4.61:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #2A7CB1 text on white | 4.54:1 | AA | Lc 71.2 | Content text, not long reading |
| #2A7CB1 text on black | 4.61:1 | AA | Lc -30.4 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A4C5DF
oklch(80.8% 0.051 242)
-
Step 400
400
#72A7CF
oklch(70.7% 0.081 241.9)
-
Step 500
500
#4A91C3
oklch(63.2% 0.104 241.7)
-
Step 600
600 (this color)
#2A7CB1
oklch(56.2% 0.113 241.6)
-
Step 700
700
#196796
oklch(49.2% 0.104 241.1)
-
Step 800
800
#18547A
oklch(42.7% 0.087 241.4)
-
Step 900
900
#1C4662
oklch(37.8% 0.067 240.9)
-
Step 950
950
#112939
oklch(27% 0.042 240.1)
#2A7CB1 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) | #637DB3 | 0.055 |
| Deuteranopia (no green cones) | #5170B0 | 0.044 |
| Tritanopia (no blue cones) | #00898F | 0.076 |
| Achromatopsia (no color) | #767676 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A7CB1
#2A7CB1
oklch(56.2% 0.113 241.6)
- #A46423
#A46423
oklch(56.3% 0.113 61.7)
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 #2A7CB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.014
- Flat Blue #3C73A8 ΔE 0.027
- Windows Blue #3778BF ΔE 0.029
- Steel Blue #4682B4 ΔE 0.030
- Cerulean #457B9D ΔE 0.035
- Muted Blue #3B719F ΔE 0.037
- Cool Blue #4984B8 ΔE 0.037
- Dull Blue #49759C ΔE 0.038
Use #2A7CB1 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.