#2B317D
Closest named color: Marine Blue (#01386A). oklch(35.7% 0.127 274.5), rgb(43, 49, 125).
Aa
White text reads best on this color (11.42:1).
About this color
#2B317D is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.127 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.053 away. White text reads best on it, at 11.42:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.83:1 |
| White text | 11.42:1 |
Values
| HEX | #2B317D |
| RGB | rgb(43, 49, 125) |
| HSL | hsl(236, 49%, 33%) |
| OKLCH | oklch(35.7% 0.127 274.5) |
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 #2B317D | 11.42:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #2B317D | 1.83:1 | Fails | Lc 7.9 | Not readable |
| #2B317D text on white | 11.42:1 | AAA | Lc 96.0 | Preferred for body text |
| #2B317D text on black | 1.83:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CED7FD
oklch(88.4% 0.053 274.8)
-
Step 300
300
#AEBCFF
oklch(80.9% 0.096 274.9)
-
Step 400
400
#8597FE
oklch(70.7% 0.151 274.4)
-
Step 500
500
#6A78FD
oklch(63.1% 0.196 274.8)
-
Step 600
600
#545DEC
oklch(55.6% 0.212 274.4)
-
Step 700
700
#454BCD
oklch(49% 0.197 274.4)
-
Step 800
800
#393FA6
oklch(42.8% 0.163 274.6)
-
Step 900
900 (this color)
#2B317D
oklch(35.7% 0.127 274.5)
-
Step 950
950
#1C214D
oklch(27.1% 0.08 274.8)
#2B317D 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) | #003D80 | 0.043 |
| Deuteranopia (no green cones) | #00367B | 0.038 |
| Tritanopia (no blue cones) | #004452 | 0.107 |
| Achromatopsia (no color) | #3A3A3A | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B317D
#2B317D
oklch(35.7% 0.127 274.5)
- #493B00
#493B00
oklch(35.7% 0.073 93.9)
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 #2B317D, closest first.
No curated palette has a color within ΔE 0.04 of #2B317D.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.053
- Twilight Blue #0A437A ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.063
- Cobalt #1E488F ΔE 0.066
- Marine #042E60 ΔE 0.067
- Midnight Blue #191970 ΔE 0.071
- Prussian Blue #1D3557 ΔE 0.072
- Blueberry #464196 ΔE 0.074
Use #2B317D 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.