#2C4DA3
Closest named color: Cobalt (#1E488F). oklch(44.6% 0.145 265.2), rgb(44, 77, 163).
Aa
White text reads best on this color (7.78:1).
About this color
#2C4DA3 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.145 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.038 away. White text reads best on it, at 7.78:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.69:1 |
| White text | 7.78:1 |
Values
| HEX | #2C4DA3 |
| RGB | rgb(44, 77, 163) |
| HSL | hsl(223, 57%, 41%) |
| OKLCH | oklch(44.6% 0.145 265.2) |
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 #2C4DA3 | 7.78:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #2C4DA3 | 2.69:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #2C4DA3 text on white | 7.78:1 | AAA | Lc 86.6 | Fine for body text |
| #2C4DA3 text on black | 2.69:1 | Fails | Lc -15.5 | Dividers and decoration only |
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
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9F9
oklch(88.4% 0.047 265.5)
-
Step 300
300
#A6C0F8
oklch(80.8% 0.085 265.2)
-
Step 400
400
#779EF5
oklch(70.8% 0.135 264.9)
-
Step 500
500
#5582F1
oklch(63% 0.174 265.2)
-
Step 600
600
#3C69DF
oklch(55.6% 0.187 265.1)
-
Step 700
700
#2F56C2
oklch(49% 0.175 265.3)
-
Step 800
800 (this color)
#2C4DA3
oklch(44.6% 0.145 265.2)
-
Step 900
900
#243D7D
oklch(37.8% 0.113 265.3)
-
Step 950
950
#152449
oklch(27% 0.072 265.3)
#2C4DA3 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) | #1458A6 | 0.031 |
| Deuteranopia (no green cones) | #004DA1 | 0.027 |
| Tritanopia (no blue cones) | #006270 | 0.117 |
| Achromatopsia (no color) | #525252 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C4DA3
#2C4DA3
oklch(44.6% 0.145 265.2)
- #6B4F00
#6B4F00
oklch(44.5% 0.091 85)
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 #2C4DA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.038
- Dusk Blue #26538D ΔE 0.042
- Blueberry #464196 ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.055
- Sapphire #2138AB ΔE 0.056
- Light Navy #155084 ΔE 0.057
- Twilight #4E518B ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.061
Use #2C4DA3 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.