#2879B2
Closest named color: Nice Blue (#107AB0). oklch(55.5% 0.117 243.9), rgb(40, 121, 178).
Aa
White text reads best on this color (4.70:1).
About this color
#2879B2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.117 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.011 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #2879B2 |
| RGB | rgb(40, 121, 178) |
| HSL | hsl(205, 63%, 43%) |
| OKLCH | oklch(55.5% 0.117 243.9) |
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 #2879B2 | 4.70:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #2879B2 | 4.46:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #2879B2 text on white | 4.70:1 | AA | Lc 72.3 | Content text, not long reading |
| #2879B2 text on black | 4.46:1 | AA large text | Lc -29.4 | Dividers and decoration only |
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
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A4C5E1
oklch(80.9% 0.053 244.1)
-
Step 400
400
#72A7D2
oklch(70.8% 0.085 243.9)
-
Step 500
500
#4A90C6
oklch(63.1% 0.108 244)
-
Step 600
600 (this color)
#2879B2
oklch(55.5% 0.117 243.9)
-
Step 700
700
#1A6699
oklch(49.1% 0.108 243.7)
-
Step 800
800
#19537C
oklch(42.6% 0.09 244)
-
Step 900
900
#1C4564
oklch(37.7% 0.07 244.2)
-
Step 950
950
#11293B
oklch(27.1% 0.045 243.2)
#2879B2 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) | #5F7BB4 | 0.053 |
| Deuteranopia (no green cones) | #4B6EB1 | 0.039 |
| Tritanopia (no blue cones) | #00878D | 0.082 |
| Achromatopsia (no color) | #747474 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2879B2
#2879B2
oklch(55.5% 0.117 243.9)
- #A26217
#A26217
oklch(55.6% 0.117 63.7)
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 #2879B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.011
- Flat Blue #3C73A8 ΔE 0.022
- Windows Blue #3778BF ΔE 0.024
- Muted Blue #3B719F ΔE 0.034
- Steel Blue #4682B4 ΔE 0.038
- Dull Blue #49759C ΔE 0.040
- Cerulean #457B9D ΔE 0.040
- French Blue #436BAD ΔE 0.041
Use #2879B2 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.