#2D479D
Closest named color: Cobalt (#1E488F). oklch(42.9% 0.143 267.3), rgb(45, 71, 157).
Aa
White text reads best on this color (8.40:1).
About this color
#2D479D is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.143 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 8.40:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.49:1 |
| White text | 8.40:1 |
Values
| HEX | #2D479D |
| RGB | rgb(45, 71, 157) |
| HSL | hsl(226, 55%, 40%) |
| OKLCH | oklch(42.9% 0.143 267.3) |
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 #2D479D | 8.40:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #2D479D | 2.49:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #2D479D text on white | 8.40:1 | AAA | Lc 88.6 | Fine for body text |
| #2D479D text on black | 2.49:1 | Fails | Lc -13.6 | 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
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A9BFF8
oklch(80.8% 0.085 268.1)
-
Step 400
400
#7B9CF4
oklch(70.6% 0.135 267.3)
-
Step 500
500
#5C81F0
oklch(63.1% 0.171 267.5)
-
Step 600
600
#4367DF
oklch(55.5% 0.187 267.4)
-
Step 700
700
#3655C1
oklch(49.1% 0.173 267.5)
-
Step 800
800 (this color)
#2D479D
oklch(42.9% 0.143 267.3)
-
Step 900
900
#273C7C
oklch(37.6% 0.112 267.2)
-
Step 950
950
#172449
oklch(27.1% 0.071 267.1)
#2D479D 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) | #0453A0 | 0.036 |
| Deuteranopia (no green cones) | #00489B | 0.029 |
| Tritanopia (no blue cones) | #005C6B | 0.116 |
| Achromatopsia (no color) | #4D4D4D | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D479D
#2D479D
oklch(42.9% 0.143 267.3)
- #644C00
#644C00
oklch(43% 0.088 87.7)
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 #2D479D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Blueberry #464196 ΔE 0.036
- Dusk Blue #26538D ΔE 0.045
- Sapphire #2138AB ΔE 0.047
- Dark Slate Blue #483D8B ΔE 0.050
- Light Navy #155084 ΔE 0.054
- Twilight #4E518B ΔE 0.064
- Denim Blue #3B5B92 ΔE 0.065
Use #2D479D 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.