#2B456E
Closest named color: Twilight Blue (#0A437A). oklch(39% 0.077 259.2), rgb(43, 69, 110).
Aa
White text reads best on this color (9.63:1).
About this color
#2B456E is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.077 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 9.63:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.17:1 |
| White text | 9.63:1 |
Values
| HEX | #2B456E |
| RGB | rgb(43, 69, 110) |
| HSL | hsl(217, 44%, 30%) |
| OKLCH | oklch(39% 0.077 259.2) |
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 #2B456E | 9.63:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #2B456E | 2.17:1 | Fails | Lc 11.8 | Not readable |
| #2B456E text on white | 9.63:1 | AAA | Lc 92.2 | Preferred for body text |
| #2B456E text on black | 2.17:1 | Fails | Lc -10.2 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ABC2E7
oklch(80.9% 0.058 259.9)
-
Step 400
400
#7EA2DA
oklch(70.7% 0.092 259)
-
Step 500
500
#5D8AD0
oklch(63.2% 0.117 258.9)
-
Step 600
600
#4372BD
oklch(55.5% 0.128 259.4)
-
Step 700
700
#345FA3
oklch(48.9% 0.12 259.2)
-
Step 800
800
#2C4E84
oklch(42.6% 0.099 259.3)
-
Step 900
900 (this color)
#2B456E
oklch(39% 0.077 259.2)
-
Step 950
950
#18273E
oklch(27.2% 0.048 258.7)
#2B456E 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) | #344870 | 0.016 |
| Deuteranopia (no green cones) | #2B426D | 0.009 |
| Tritanopia (no blue cones) | #004E54 | 0.067 |
| Achromatopsia (no color) | #454545 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B456E
#2B456E
oklch(39% 0.077 259.2)
- #5B3F07
#5B3F07
oklch(39% 0.077 78.5)
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 #2B456E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.034
- Light Navy #155084 ΔE 0.045
- Charcoal #264653 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.052
- Cobalt #1E488F ΔE 0.055
- Marine Blue #01386A ΔE 0.057
- Dusk Blue #26538D ΔE 0.060
Use #2B456E 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.