#2A4A85
Closest named color: Cobalt (#1E488F). oklch(41.7% 0.106 261.5), rgb(42, 74, 133).
Aa
White text reads best on this color (8.68:1).
About this color
#2A4A85 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.106 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 8.68:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.41:1 |
| White text | 8.68:1 |
Values
| HEX | #2A4A85 |
| RGB | rgb(42, 74, 133) |
| HSL | hsl(219, 52%, 34%) |
| OKLCH | oklch(41.7% 0.106 261.5) |
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 #2A4A85 | 8.68:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #2A4A85 | 2.41:1 | Fails | Lc 14.4 | Not readable |
| #2A4A85 text on white | 8.68:1 | AAA | Lc 89.6 | Fine for body text |
| #2A4A85 text on black | 2.41:1 | Fails | Lc -12.7 | 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
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ABC2E9
oklch(81% 0.061 261)
-
Step 400
400
#7EA1DF
oklch(70.8% 0.099 261.5)
-
Step 500
500
#5D88D5
oklch(63% 0.126 261.3)
-
Step 600
600
#4471C3
oklch(55.7% 0.137 261.4)
-
Step 700
700
#365EA8
oklch(49.1% 0.127 261.5)
-
Step 800
800 (this color)
#2A4A85
oklch(41.7% 0.106 261.5)
-
Step 900
900
#28416D
oklch(37.8% 0.082 261)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#2A4A85 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) | #2E5087 | 0.019 |
| Deuteranopia (no green cones) | #1F4784 | 0.015 |
| Tritanopia (no blue cones) | #005861 | 0.087 |
| Achromatopsia (no color) | #4B4B4B | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4A85
#2A4A85
oklch(41.7% 0.106 261.5)
- #634600
#634600
oklch(41.5% 0.086 81.5)
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 #2A4A85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Light Navy #155084 ΔE 0.022
- Dusk Blue #26538D ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.036
- Twilight Blue #0A437A ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.048
- Dark Slate Blue #483D8B ΔE 0.052
- Blueberry #464196 ΔE 0.052
Use #2A4A85 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.