#2A3E94
Closest named color: Cobalt (#1E488F). oklch(40.2% 0.143 269.1), rgb(42, 62, 148).
Aa
White text reads best on this color (9.48:1).
About this color
#2A3E94 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.143 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.029 away. White text reads best on it, at 9.48:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #2A3E94 |
| RGB | rgb(42, 62, 148) |
| HSL | hsl(229, 56%, 37%) |
| OKLCH | oklch(40.2% 0.143 269.1) |
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 #2A3E94 | 9.48:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #2A3E94 | 2.21:1 | Fails | Lc 12.5 | Not readable |
| #2A3E94 text on white | 9.48:1 | AAA | Lc 91.5 | Preferred for body text |
| #2A3E94 text on black | 2.21:1 | Fails | Lc -10.9 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A7BEFF
oklch(80.8% 0.096 269.2)
-
Step 400
400
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500
#5A7CFF
oklch(63% 0.198 269.1)
-
Step 600
600
#3F5BFC
oklch(55.5% 0.239 269.1)
-
Step 700
700
#3349DC
oklch(49.1% 0.223 269.2)
-
Step 800
800
#293EB1
oklch(42.7% 0.183 268.9)
-
Step 900
900 (this color)
#2A3E94
oklch(40.2% 0.143 269.1)
-
Step 950
950
#152152
oklch(27% 0.091 269.1)
#2A3E94 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) | #004B97 | 0.039 |
| Deuteranopia (no green cones) | #004192 | 0.029 |
| Tritanopia (no blue cones) | #005362 | 0.116 |
| Achromatopsia (no color) | #464646 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3E94
#2A3E94
oklch(40.2% 0.143 269.1)
- #5A4500
#5A4500
oklch(40.2% 0.082 88.8)
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 #2A3E94, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.029
- Blueberry #464196 ΔE 0.041
- Sapphire #2138AB ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.045
- Twilight Blue #0A437A ΔE 0.054
- Light Navy #155084 ΔE 0.060
- Dusk Blue #26538D ΔE 0.060
- Deep Sea Blue #015482 ΔE 0.074
Use #2A3E94 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.