#2F386F
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.095 273.8), rgb(47, 56, 111).
Aa
White text reads best on this color (10.95:1).
About this color
#2F386F is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.095 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.043 away. White text reads best on it, at 10.95:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.91:1 |
| White text | 10.95:1 |
Values
| HEX | #2F386F |
| RGB | rgb(47, 56, 111) |
| HSL | hsl(232, 41%, 31%) |
| OKLCH | oklch(36.3% 0.095 273.8) |
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 #2F386F | 10.95:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #2F386F | 1.91:1 | Fails | Lc 8.7 | Not readable |
| #2F386F text on white | 10.95:1 | AAA | Lc 95.2 | Preferred for body text |
| #2F386F text on black | 1.91:1 | Fails | Lc -7.5 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D0D8F4
oklch(88.5% 0.04 272.9)
-
Step 300
300
#B2BEEF
oklch(80.9% 0.071 274)
-
Step 400
400
#8A9BE7
oklch(70.7% 0.113 273.6)
-
Step 500
500
#6F80E0
oklch(63.1% 0.145 273.9)
-
Step 600
600
#5867CE
oklch(55.5% 0.158 273.9)
-
Step 700
700
#4955B2
oklch(49% 0.147 274.1)
-
Step 800
800
#3B4690
oklch(42.6% 0.122 273.7)
-
Step 900
900 (this color)
#2F386F
oklch(36.3% 0.095 273.8)
-
Step 950
950
#1D2343
oklch(26.8% 0.06 273.7)
#2F386F 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) | #1F3F71 | 0.026 |
| Deuteranopia (no green cones) | #163A6E | 0.029 |
| Tritanopia (no blue cones) | #0E444E | 0.083 |
| Achromatopsia (no color) | #3C3C3C | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F386F
#2F386F
oklch(36.3% 0.095 273.8)
- #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 #2F386F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.043
- Marine Blue #01386A ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.062
- Marine #042E60 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.064
- Cobalt #1E488F ΔE 0.065
- Dark Blue Grey #1F3B4D ΔE 0.067
Use #2F386F 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.