#2F579B
Closest named color: Denim Blue (#3B5B92). oklch(46.4% 0.12 260.3), rgb(47, 87, 155).
Aa
White text reads best on this color (7.10:1).
About this color
#2F579B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.120 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.024 away. White text reads best on it, at 7.10:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.95:1 |
| White text | 7.10:1 |
Values
| HEX | #2F579B |
| RGB | rgb(47, 87, 155) |
| HSL | hsl(218, 53%, 40%) |
| OKLCH | oklch(46.4% 0.12 260.3) |
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 #2F579B | 7.10:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #2F579B | 2.95:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #2F579B text on white | 7.10:1 | AAA | Lc 84.3 | Fine for body text |
| #2F579B text on black | 2.95:1 | Fails | Lc -17.6 | 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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ABC2E7
oklch(80.9% 0.058 259.9)
-
Step 400
400
#7FA1DB
oklch(70.6% 0.094 260.8)
-
Step 500
500
#5F89D1
oklch(63.1% 0.119 260.7)
-
Step 600
600
#4572BE
oklch(55.7% 0.129 260.3)
-
Step 700
700 (this color)
#2F579B
oklch(46.4% 0.12 260.3)
-
Step 800
800
#2D4E85
oklch(42.7% 0.1 260.1)
-
Step 900
900
#29416A
oklch(37.7% 0.077 260.5)
-
Step 950
950
#18263E
oklch(26.9% 0.049 260.7)
#2F579B 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) | #365E9E | 0.022 |
| Deuteranopia (no green cones) | #24549A | 0.014 |
| Tritanopia (no blue cones) | #006771 | 0.097 |
| Achromatopsia (no color) | #585858 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F579B
#2F579B
oklch(46.4% 0.12 260.3)
- #755200
#755200
oklch(46.4% 0.096 80.1)
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 #2F579B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.024
- Dusk Blue #26538D ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.034
- Dusky Blue #475F94 ΔE 0.041
- Twilight #4E518B ΔE 0.044
- Light Navy #155084 ΔE 0.048
- Denim #3B638C ΔE 0.050
- Cobalt #1E488F ΔE 0.050
Use #2F579B 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.