#2A508E
Closest named color: Dusk Blue (#26538D). oklch(43.7% 0.111 259.7), rgb(42, 80, 142).
Aa
White text reads best on this color (7.96:1).
About this color
#2A508E 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 0.009 away. White text reads best on it, at 7.96:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.63:1 |
| White text | 7.96:1 |
Values
| HEX | #2A508E |
| RGB | rgb(42, 80, 142) |
| HSL | hsl(217, 54%, 36%) |
| OKLCH | oklch(43.7% 0.111 259.7) |
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 #2A508E | 7.96:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #2A508E | 2.63:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #2A508E text on white | 7.96:1 | AAA | Lc 87.3 | Fine for body text |
| #2A508E text on black | 2.63:1 | 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
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A8C2EB
oklch(80.9% 0.065 259.4)
-
Step 400
400
#7AA1E1
oklch(70.6% 0.104 260)
-
Step 500
500
#5789D9
oklch(63.1% 0.133 259.4)
-
Step 600
600
#3C71C7
oklch(55.6% 0.145 259.6)
-
Step 700
700
#2F5EAC
oklch(49.1% 0.135 260)
-
Step 800
800 (this color)
#2A508E
oklch(43.7% 0.111 259.7)
-
Step 900
900
#24416F
oklch(37.7% 0.087 259.3)
-
Step 950
950
#162641
oklch(27% 0.055 260.3)
#2A508E 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 | 0.012 |
| 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°).
- #2A508E
#2A508E
oklch(43.7% 0.111 259.7)
- #6C4B00
#6C4B00
oklch(43.8% 0.091 79.6)
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 #2A508E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.009
- Light Navy #155084 ΔE 0.024
- Cobalt #1E488F ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.039
- Twilight #4E518B ΔE 0.046
- Dusk #4E5481 ΔE 0.053
Use #2A508E 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.