#2F3D69
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.078 269), rgb(47, 61, 105).
Aa
White text reads best on this color (10.54:1).
About this color
#2F3D69 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.078 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.041 away. White text reads best on it, at 10.54:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.99:1 |
| White text | 10.54:1 |
Values
| HEX | #2F3D69 |
| RGB | rgb(47, 61, 105) |
| HSL | hsl(226, 38%, 30%) |
| OKLCH | oklch(37% 0.078 269) |
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 #2F3D69 | 10.54:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #2F3D69 | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #2F3D69 text on white | 10.54:1 | AAA | Lc 94.3 | Preferred for body text |
| #2F3D69 text on black | 1.99:1 | Fails | Lc -8.2 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B1C0E7
oklch(80.9% 0.058 268.6)
-
Step 400
400
#899EDC
oklch(70.7% 0.094 269.5)
-
Step 500
500
#6C85D2
oklch(63.1% 0.12 269.2)
-
Step 600
600
#546DBF
oklch(55.5% 0.131 269.1)
-
Step 700
700
#455BA5
oklch(49.1% 0.121 269.1)
-
Step 800
800
#394B86
oklch(42.8% 0.1 269.1)
-
Step 900
900 (this color)
#2F3D69
oklch(37% 0.078 269)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#2F3D69 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) | #2B426B | 0.015 |
| Deuteranopia (no green cones) | #253D68 | 0.013 |
| Tritanopia (no blue cones) | #14464E | 0.068 |
| Achromatopsia (no color) | #3F3F3F | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3D69
#2F3D69
oklch(37% 0.078 269)
- #503D00
#503D00
oklch(37% 0.076 88.8)
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 #2F3D69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.046
- Marine Blue #01386A ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.055
- Charcoal #264653 ΔE 0.055
- Light Navy #155084 ΔE 0.066
- Cobalt #1E488F ΔE 0.067
Use #2F3D69 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.