#2F3679
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.113 274.9), rgb(47, 54, 121).
Aa
White text reads best on this color (10.91:1).
About this color
#2F3679 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.113 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.045 away. White text reads best on it, at 10.91:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.92:1 |
| White text | 10.91:1 |
Values
| HEX | #2F3679 |
| RGB | rgb(47, 54, 121) |
| HSL | hsl(234, 44%, 33%) |
| OKLCH | oklch(36.6% 0.113 274.9) |
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 #2F3679 | 10.91:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #2F3679 | 1.92:1 | Fails | Lc 8.9 | Not readable |
| #2F3679 text on white | 10.91:1 | AAA | Lc 95.0 | Preferred for body text |
| #2F3679 text on black | 1.92:1 | Fails | Lc -7.6 | Not readable |
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 900.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#CFD7F9
oklch(88.4% 0.048 274.9)
-
Step 300
300
#B0BDF8
oklch(80.9% 0.085 274.7)
-
Step 400
400
#8898F4
oklch(70.6% 0.136 274.9)
-
Step 500
500
#6D7CF0
oklch(63.1% 0.173 274.8)
-
Step 600
600
#5762DF
oklch(55.7% 0.188 274.7)
-
Step 700
700
#4850C1
oklch(49.1% 0.174 274.9)
-
Step 800
800
#3B429C
oklch(42.7% 0.145 275.1)
-
Step 900
900 (this color)
#2F3679
oklch(36.6% 0.113 274.9)
-
Step 950
950
#1D2249
oklch(27% 0.072 275)
#2F3679 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) | #0D407B | 0.039 |
| Deuteranopia (no green cones) | #003A78 | 0.041 |
| Tritanopia (no blue cones) | #004552 | 0.098 |
| Achromatopsia (no color) | #3D3D3D | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3679
#2F3679
oklch(36.6% 0.113 274.9)
- #4B3E00
#4B3E00
oklch(36.7% 0.075 95.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #2F3679
These curated palettes and gradients contain exactly #2F3679. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.045
- Marine Blue #01386A ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.055
- Cobalt #1E488F ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.065
- Blueberry #464196 ΔE 0.068
- Marine #042E60 ΔE 0.070
- Light Navy #155084 ΔE 0.074
Use #2F3679 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.