#2F4099
Closest named color: Cobalt (#1E488F). oklch(41.3% 0.146 270.5), rgb(47, 64, 153).
Aa
White text reads best on this color (9.07:1).
About this color
#2F4099 is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.146 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.031 away. White text reads best on it, at 9.07:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.31:1 |
| White text | 9.07:1 |
Values
| HEX | #2F4099 |
| RGB | rgb(47, 64, 153) |
| HSL | hsl(230, 53%, 39%) |
| OKLCH | oklch(41.3% 0.146 270.5) |
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 #2F4099 | 9.07:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #2F4099 | 2.31:1 | Fails | Lc 13.5 | Not readable |
| #2F4099 text on white | 9.07:1 | AAA | Lc 90.5 | Preferred for body text |
| #2F4099 text on black | 2.31:1 | Fails | Lc -11.8 | 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
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ABBEF9
oklch(80.8% 0.086 270.6)
-
Step 400
400
#809BF6
oklch(70.8% 0.137 270.1)
-
Step 500
500
#637FF2
oklch(63.2% 0.174 270.5)
-
Step 600
600
#4C64E0
oklch(55.5% 0.19 270.7)
-
Step 700
700
#3D52C3
oklch(49% 0.177 270.5)
-
Step 800
800 (this color)
#2F4099
oklch(41.3% 0.146 270.5)
-
Step 900
900
#2C3B7D
oklch(37.8% 0.113 270.5)
-
Step 950
950
#192349
oklch(27% 0.072 270)
#2F4099 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) | #004D9C | 0.041 |
| Deuteranopia (no green cones) | #004497 | 0.034 |
| Tritanopia (no blue cones) | #005666 | 0.120 |
| Achromatopsia (no color) | #484848 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4099
#2F4099
oklch(41.3% 0.146 270.5)
- #5D4800
#5D4800
oklch(41.2% 0.084 89.5)
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 #2F4099, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.031
- Blueberry #464196 ΔE 0.034
- Sapphire #2138AB ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.042
- Dusk Blue #26538D ΔE 0.057
- Light Navy #155084 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.063
- Twilight #4E518B ΔE 0.073
Use #2F4099 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.