#2A4182
Closest named color: Cobalt (#1E488F). oklch(39.4% 0.113 266.6), rgb(42, 65, 130).
Aa
White text reads best on this color (9.64:1).
About this color
#2A4182 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.113 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 9.64:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.17:1 |
| White text | 9.64:1 |
Values
| HEX | #2A4182 |
| RGB | rgb(42, 65, 130) |
| HSL | hsl(224, 51%, 34%) |
| OKLCH | oklch(39.4% 0.113 266.6) |
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 #2A4182 | 9.64:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #2A4182 | 2.17:1 | Fails | Lc 11.9 | Not readable |
| #2A4182 text on white | 9.64:1 | AAA | Lc 92.1 | Preferred for body text |
| #2A4182 text on black | 2.17:1 | Fails | Lc -10.3 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A8C0F8
oklch(81% 0.084 266.5)
-
Step 400
400
#7A9DF5
oklch(70.8% 0.135 266.6)
-
Step 500
500
#5981F1
oklch(63% 0.174 266.7)
-
Step 600
600
#4168E0
oklch(55.7% 0.188 266.6)
-
Step 700
700
#3355C2
oklch(49% 0.175 266.7)
-
Step 800
800
#2A479D
oklch(42.8% 0.144 266.3)
-
Step 900
900 (this color)
#2A4182
oklch(39.4% 0.113 266.6)
-
Step 950
950
#162449
oklch(27% 0.071 266.2)
#2A4182 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) | #1F4984 | 0.023 |
| Deuteranopia (no green cones) | #0A4181 | 0.026 |
| Tritanopia (no blue cones) | #00505B | 0.094 |
| Achromatopsia (no color) | #454545 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4182
#2A4182
oklch(39.4% 0.113 266.6)
- #594200
#594200
oklch(39.3% 0.081 86)
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 #2A4182, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Twilight Blue #0A437A ΔE 0.030
- Light Navy #155084 ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.047
- Dusk Blue #26538D ΔE 0.052
- Blueberry #464196 ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.057
- Marine Blue #01386A ΔE 0.062
Use #2A4182 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.