#2A4593
Closest named color: Cobalt (#1E488F). oklch(41.6% 0.133 266.3), rgb(42, 69, 147).
Aa
White text reads best on this color (8.85:1).
About this color
#2A4593 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.133 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.015 away. White text reads best on it, at 8.85:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #2A4593 |
| RGB | rgb(42, 69, 147) |
| HSL | hsl(225, 56%, 37%) |
| OKLCH | oklch(41.6% 0.133 266.3) |
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 #2A4593 | 8.85:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #2A4593 | 2.37:1 | Fails | Lc 14.1 | Not readable |
| #2A4593 text on white | 8.85:1 | AAA | Lc 89.9 | Fine for body text |
| #2A4593 text on black | 2.37:1 | Fails | Lc -12.4 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#A9C0F4
oklch(80.9% 0.078 266.1)
-
Step 400
400
#7D9EEE
oklch(70.8% 0.123 266.3)
-
Step 500
500
#5D83E9
oklch(63.1% 0.159 266.5)
-
Step 600
600
#446AD7
oklch(55.6% 0.173 266.4)
-
Step 700
700
#3658BA
oklch(49.1% 0.16 266.2)
-
Step 800
800 (this color)
#2A4593
oklch(41.6% 0.133 266.3)
-
Step 900
900
#283D78
oklch(37.6% 0.104 266.7)
-
Step 950
950
#172446
oklch(26.9% 0.066 266.3)
#2A4593 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) | #134F96 | 0.029 |
| Deuteranopia (no green cones) | #004591 | 0.028 |
| Tritanopia (no blue cones) | #005865 | 0.108 |
| Achromatopsia (no color) | #4A4A4A | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4593
#2A4593
oklch(41.6% 0.133 266.3)
- #604800
#604800
oklch(41.6% 0.085 86.7)
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 #2A4593, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.015
- Blueberry #464196 ΔE 0.038
- Dusk Blue #26538D ΔE 0.042
- Light Navy #155084 ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.045
- Twilight Blue #0A437A ΔE 0.051
- Sapphire #2138AB ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.058
Use #2A4593 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.