#2D4C99
Closest named color: Cobalt (#1E488F). oklch(43.7% 0.131 264.9), rgb(45, 76, 153).
Aa
White text reads best on this color (8.06:1).
About this color
#2D4C99 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.131 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.026 away. White text reads best on it, at 8.06:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.60:1 |
| White text | 8.06:1 |
Values
| HEX | #2D4C99 |
| RGB | rgb(45, 76, 153) |
| HSL | hsl(223, 55%, 39%) |
| OKLCH | oklch(43.7% 0.131 264.9) |
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 #2D4C99 | 8.06:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #2D4C99 | 2.60:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #2D4C99 text on white | 8.06:1 | AAA | Lc 87.6 | Fine for body text |
| #2D4C99 text on black | 2.60:1 | Fails | Lc -14.5 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CBD9F6
oklch(88.4% 0.043 265)
-
Step 300
300
#A8C0F3
oklch(80.8% 0.077 265.1)
-
Step 400
400
#7B9EED
oklch(70.6% 0.123 265.2)
-
Step 500
500
#5A84E8
oklch(63.1% 0.158 265.1)
-
Step 600
600
#416BD6
oklch(55.6% 0.171 265.1)
-
Step 700
700
#3359B9
oklch(49.1% 0.158 264.9)
-
Step 800
800 (this color)
#2D4C99
oklch(43.7% 0.131 264.9)
-
Step 900
900
#263E77
oklch(37.7% 0.102 264.8)
-
Step 950
950
#172546
oklch(27.1% 0.064 265.1)
#2D4C99 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) | #20559C | 0.025 |
| Deuteranopia (no green cones) | #004B97 | 0.029 |
| Tritanopia (no blue cones) | #005E6B | 0.106 |
| Achromatopsia (no color) | #505050 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D4C99
#2D4C99
oklch(43.7% 0.131 264.9)
- #684D00
#684D00
oklch(43.7% 0.09 85.3)
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 #2D4C99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Dusk Blue #26538D ΔE 0.030
- Blueberry #464196 ΔE 0.040
- Light Navy #155084 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.052
- Twilight #4E518B ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.053
Use #2D4C99 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.