#2F4599
Closest named color: Cobalt (#1E488F). oklch(42.3% 0.14 268.7), rgb(47, 69, 153).
Aa
White text reads best on this color (8.63:1).
About this color
#2F4599 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.140 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.025 away. White text reads best on it, at 8.63:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #2F4599 |
| RGB | rgb(47, 69, 153) |
| HSL | hsl(228, 53%, 39%) |
| OKLCH | oklch(42.3% 0.14 268.7) |
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 #2F4599 | 8.63:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #2F4599 | 2.43:1 | Fails | Lc 14.7 | Not readable |
| #2F4599 text on white | 8.63:1 | AAA | Lc 89.3 | Fine for body text |
| #2F4599 text on black | 2.43:1 | Fails | Lc -13.0 | 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
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#ABBFF6
oklch(80.9% 0.081 269)
-
Step 400
400
#7F9CF2
oklch(70.7% 0.13 268.8)
-
Step 500
500
#6081ED
oklch(63.1% 0.166 268.6)
-
Step 600
600
#4867DC
oklch(55.6% 0.182 268.6)
-
Step 700
700
#3A55BF
oklch(49.1% 0.169 268.6)
-
Step 800
800 (this color)
#2F4599
oklch(42.3% 0.14 268.7)
-
Step 900
900
#2A3C7B
oklch(37.7% 0.109 268.7)
-
Step 950
950
#192448
oklch(27.1% 0.068 268.7)
#2F4599 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) | #06519C | 0.038 |
| Deuteranopia (no green cones) | #004797 | 0.032 |
| Tritanopia (no blue cones) | #005968 | 0.114 |
| Achromatopsia (no color) | #4C4C4C | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4599
#2F4599
oklch(42.3% 0.14 268.7)
- #614B00
#614B00
oklch(42.4% 0.087 89.3)
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 #2F4599, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.025
- Blueberry #464196 ΔE 0.032
- Dark Slate Blue #483D8B ΔE 0.043
- Dusk Blue #26538D ΔE 0.046
- Sapphire #2138AB ΔE 0.047
- Light Navy #155084 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.062
- Twilight #4E518B ΔE 0.063
Use #2F4599 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.