#2B347B
Closest named color: Twilight Blue (#0A437A). oklch(36.1% 0.12 273.4), rgb(43, 52, 123).
Aa
White text reads best on this color (11.17:1).
About this color
#2B347B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.120 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.047 away. White text reads best on it, at 11.17:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #2B347B |
| RGB | rgb(43, 52, 123) |
| HSL | hsl(233, 48%, 33%) |
| OKLCH | oklch(36.1% 0.12 273.4) |
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 #2B347B | 11.17:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #2B347B | 1.87:1 | Fails | Lc 8.4 | Not readable |
| #2B347B text on white | 11.17:1 | AAA | Lc 95.5 | Preferred for body text |
| #2B347B 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#ADBDFB
oklch(80.8% 0.09 273.1)
-
Step 400
400
#8498FA
oklch(70.7% 0.145 273.4)
-
Step 500
500
#687BF7
oklch(63.1% 0.185 273.4)
-
Step 600
600
#5260E6
oklch(55.6% 0.201 273.4)
-
Step 700
700
#434FC8
oklch(49.2% 0.186 273.1)
-
Step 800
800
#3741A1
oklch(42.6% 0.154 273.4)
-
Step 900
900 (this color)
#2B347B
oklch(36.1% 0.12 273.4)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#2B347B 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) | #003F7D | 0.041 |
| Deuteranopia (no green cones) | #00387A | 0.036 |
| Tritanopia (no blue cones) | #004552 | 0.102 |
| Achromatopsia (no color) | #3B3B3B | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B347B
#2B347B
oklch(36.1% 0.12 273.4)
- #4B3C00
#4B3C00
oklch(36.2% 0.074 93)
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 #2B347B, closest first.
No curated palette has a color within ΔE 0.04 of #2B347B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.047
- Marine Blue #01386A ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.060
- Cobalt #1E488F ΔE 0.060
- Marine #042E60 ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.067
- Blueberry #464196 ΔE 0.072
- Midnight Blue #191970 ΔE 0.077
Use #2B347B 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.