#2A4C97
Closest named color: Cobalt (#1E488F). oklch(43.4% 0.129 263.6), rgb(42, 76, 151).
Aa
White text reads best on this color (8.14:1).
About this color
#2A4C97 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.129 and its hue 264°. 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 8.14:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.57:1 |
| White text | 8.14:1 |
Values
| HEX | #2A4C97 |
| RGB | rgb(42, 76, 151) |
| HSL | hsl(221, 56%, 38%) |
| OKLCH | oklch(43.4% 0.129 263.6) |
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 #2A4C97 | 8.14:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #2A4C97 | 2.57:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #2A4C97 text on white | 8.14:1 | AAA | Lc 87.8 | Fine for body text |
| #2A4C97 text on black | 2.57:1 | Fails | Lc -14.3 | 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 800.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF6
oklch(88.6% 0.042 263)
-
Step 300
300
#A8C1F2
oklch(80.9% 0.075 263.7)
-
Step 400
400
#799FEC
oklch(70.7% 0.121 263.6)
-
Step 500
500
#5785E6
oklch(63.1% 0.155 263.5)
-
Step 600
600
#3E6CD4
oklch(55.5% 0.168 263.8)
-
Step 700
700
#305AB8
oklch(49.1% 0.156 263.6)
-
Step 800
800 (this color)
#2A4C97
oklch(43.4% 0.129 263.6)
-
Step 900
900
#253F77
oklch(37.9% 0.101 263.6)
-
Step 950
950
#162545
oklch(27% 0.063 263.8)
#2A4C97 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) | #22559A | 0.025 |
| Deuteranopia (no green cones) | #014B95 | 0.026 |
| Tritanopia (no blue cones) | #005E6A | 0.105 |
| Achromatopsia (no color) | #4F4F4F | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4C97
#2A4C97
oklch(43.4% 0.129 263.6)
- #684C00
#684C00
oklch(43.5% 0.089 84.2)
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 #2A4C97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Dusk Blue #26538D ΔE 0.028
- Light Navy #155084 ΔE 0.039
- Blueberry #464196 ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.053
Use #2A4C97 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.