#2F4380
Closest named color: Cobalt (#1E488F). oklch(40% 0.106 267.8), rgb(47, 67, 128).
Aa
White text reads best on this color (9.39:1).
About this color
#2F4380 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.106 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.030 away. White text reads best on it, at 9.39:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #2F4380 |
| RGB | rgb(47, 67, 128) |
| HSL | hsl(225, 46%, 34%) |
| OKLCH | oklch(40% 0.106 267.8) |
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 #2F4380 | 9.39:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #2F4380 | 2.23:1 | Fails | Lc 12.5 | Not readable |
| #2F4380 text on white | 9.39:1 | AAA | Lc 91.5 | Preferred for body text |
| #2F4380 text on black | 2.23:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#AABFF5
oklch(80.8% 0.08 268.1)
-
Step 400
400
#7E9DF0
oklch(70.7% 0.127 267.6)
-
Step 500
500
#5F82EA
oklch(63.1% 0.161 267.6)
-
Step 600
600
#4769D9
oklch(55.7% 0.176 267.6)
-
Step 700
700
#3956BC
oklch(49% 0.164 267.9)
-
Step 800
800
#2F4798
oklch(42.6% 0.136 267.8)
-
Step 900
900 (this color)
#2F4380
oklch(40% 0.106 267.8)
-
Step 950
950
#182447
oklch(27% 0.067 267.5)
#2F4380 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) | #264A82 | 0.021 |
| Deuteranopia (no green cones) | #19437F | 0.023 |
| Tritanopia (no blue cones) | #00515B | 0.091 |
| Achromatopsia (no color) | #464646 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4380
#2F4380
oklch(40% 0.106 267.8)
- #5A4400
#5A4400
oklch(39.9% 0.082 87.6)
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 #2F4380, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.030
- Twilight Blue #0A437A ΔE 0.034
- Light Navy #155084 ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.044
- Dusk Blue #26538D ΔE 0.047
- Blueberry #464196 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.053
- Twilight #4E518B ΔE 0.065
Use #2F4380 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.