#2F3678
Closest named color: Twilight Blue (#0A437A). oklch(36.5% 0.112 274.9), rgb(47, 54, 120).
Aa
White text reads best on this color (10.93:1).
About this color
#2F3678 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.112 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 10.93:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.91:1 |
| White text | 10.93:1 |
Values
| HEX | #2F3678 |
| RGB | rgb(47, 54, 120) |
| HSL | hsl(234, 44%, 33%) |
| OKLCH | oklch(36.5% 0.112 274.9) |
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 #2F3678 | 10.93:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #2F3678 | 1.91:1 | Fails | Lc 8.8 | Not readable |
| #2F3678 text on white | 10.93:1 | AAA | Lc 95.1 | Preferred for body text |
| #2F3678 text on black | 1.91:1 | 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
#D0D7F9
oklch(88.5% 0.047 276.2)
-
Step 300
300
#B0BDF7
oklch(80.9% 0.083 274.6)
-
Step 400
400
#8999F3
oklch(70.8% 0.133 274.9)
-
Step 500
500
#6D7CEF
oklch(63.1% 0.171 274.8)
-
Step 600
600
#5762DD
oklch(55.5% 0.185 274.8)
-
Step 700
700
#4850C0
oklch(49.1% 0.173 274.9)
-
Step 800
800
#3B429B
oklch(42.6% 0.143 275.1)
-
Step 900
900 (this color)
#2F3678
oklch(36.5% 0.112 274.9)
-
Step 950
950
#1D2248
oklch(27% 0.07 275)
#2F3678 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) | #0F407A | 0.038 |
| Deuteranopia (no green cones) | #003A77 | 0.041 |
| Tritanopia (no blue cones) | #004551 | 0.098 |
| Achromatopsia (no color) | #3D3D3D | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3678
#2F3678
oklch(36.5% 0.112 274.9)
- #4B3D00
#4B3D00
oklch(36.4% 0.075 94.3)
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 #2F3678, closest first.
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 0.050
- Dark Slate Blue #483D8B ΔE 0.056
- Cobalt #1E488F ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.064
- Blueberry #464196 ΔE 0.069
- Marine #042E60 ΔE 0.069
- Light Navy #155084 ΔE 0.074
Use #2F3678 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.