#2F3083
Closest named color: Dark Slate Blue (#483D8B). oklch(36.3% 0.136 276.7), rgb(47, 48, 131).
Aa
White text reads best on this color (11.22:1).
About this color
#2F3083 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.136 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.057 away. White text reads best on it, at 11.22:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.87:1 |
| White text | 11.22:1 |
Values
| HEX | #2F3083 |
| RGB | rgb(47, 48, 131) |
| HSL | hsl(239, 47%, 35%) |
| OKLCH | oklch(36.3% 0.136 276.7) |
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 #2F3083 | 11.22:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #2F3083 | 1.87:1 | Fails | Lc 8.4 | Not readable |
| #2F3083 text on white | 11.22:1 | AAA | Lc 95.5 | Preferred for body text |
| #2F3083 text on black | 1.87:1 | Fails | Lc 0.0 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CFD7FF
oklch(88.6% 0.056 276.3)
-
Step 300
300
#B0BBFF
oklch(80.8% 0.097 276.9)
-
Step 400
400
#8995FF
oklch(70.7% 0.154 276.8)
-
Step 500
500
#6E76FF
oklch(63.1% 0.2 276.5)
-
Step 600
600
#5957F3
oklch(55.5% 0.226 276.6)
-
Step 700
700
#4A46D4
oklch(49.2% 0.21 276.6)
-
Step 800
800
#3C3BAB
oklch(42.7% 0.174 276.5)
-
Step 900
900 (this color)
#2F3083
oklch(36.3% 0.136 276.7)
-
Step 950
950
#1D204F
oklch(27.1% 0.085 276.4)
#2F3083 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) | #003F86 | 0.050 |
| Deuteranopia (no green cones) | #003781 | 0.043 |
| Tritanopia (no blue cones) | #004554 | 0.116 |
| Achromatopsia (no color) | #3B3B3B | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3083
#2F3083
oklch(36.3% 0.136 276.7)
- #493D00
#493D00
oklch(36.2% 0.075 96.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #2F3083, closest first.
No curated palette has a color within ΔE 0.04 of #2F3083.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.057
- Twilight Blue #0A437A ΔE 0.060
- Cobalt #1E488F ΔE 0.064
- Marine Blue #01386A ΔE 0.065
- Blueberry #464196 ΔE 0.067
- Sapphire #2138AB ΔE 0.070
- Royal #0C1793 ΔE 0.075
- Midnight Blue #191970 ΔE 0.076
Use #2F3083 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.