#2B508E
Closest named color: Dusk Blue (#26538D). oklch(43.7% 0.111 260.1), rgb(43, 80, 142).
Aa
White text reads best on this color (7.95:1).
About this color
#2B508E is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.111 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.010 away. White text reads best on it, at 7.95:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.64:1 |
| White text | 7.95:1 |
Values
| HEX | #2B508E |
| RGB | rgb(43, 80, 142) |
| HSL | hsl(218, 54%, 36%) |
| OKLCH | oklch(43.7% 0.111 260.1) |
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 #2B508E | 7.95:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #2B508E | 2.64:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #2B508E text on white | 7.95:1 | AAA | Lc 87.3 | Fine for body text |
| #2B508E text on black | 2.64:1 | Fails | Lc -14.8 | 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 800.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#A9C2EB
oklch(80.9% 0.064 260.3)
-
Step 400
400
#7AA1E1
oklch(70.6% 0.104 260)
-
Step 500
500
#5889D9
oklch(63.2% 0.132 259.8)
-
Step 600
600
#3E71C6
oklch(55.6% 0.143 260)
-
Step 700
700
#305EAB
oklch(49.1% 0.133 260.1)
-
Step 800
800 (this color)
#2B508E
oklch(43.7% 0.111 260.1)
-
Step 900
900
#25416F
oklch(37.8% 0.086 259.8)
-
Step 950
950
#162641
oklch(27% 0.055 260.3)
#2B508E 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) | #335690 | 0.021 |
| Deuteranopia (no green cones) | #224D8D | 0.013 |
| Tritanopia (no blue cones) | #005E68 | 0.089 |
| Achromatopsia (no color) | #515151 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B508E
#2B508E
oklch(43.7% 0.111 260.1)
- #6B4B00
#6B4B00
oklch(43.6% 0.09 80.5)
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 #2B508E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.010
- Light Navy #155084 ΔE 0.025
- Cobalt #1E488F ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.039
- Twilight #4E518B ΔE 0.045
- Dusk #4E5481 ΔE 0.052
Use #2B508E 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.