#2F4797
Closest named color: Cobalt (#1E488F). oklch(42.6% 0.134 267.8), rgb(47, 71, 151).
Aa
White text reads best on this color (8.50:1).
About this color
#2F4797 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.134 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.022 away. White text reads best on it, at 8.50:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.46:1 |
| White text | 8.50:1 |
Values
| HEX | #2F4797 |
| RGB | rgb(47, 71, 151) |
| HSL | hsl(226, 53%, 39%) |
| OKLCH | oklch(42.6% 0.134 267.8) |
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 #2F4797 | 8.50:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #2F4797 | 2.46:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #2F4797 text on white | 8.50:1 | AAA | Lc 88.9 | Fine for body text |
| #2F4797 text on black | 2.46:1 | Fails | Lc -13.3 | 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
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ABC0F4
oklch(81% 0.077 267.5)
-
Step 400
400
#7F9DEF
oklch(70.8% 0.125 267.9)
-
Step 500
500
#5F82EA
oklch(63.1% 0.161 267.6)
-
Step 600
600
#4769D8
oklch(55.6% 0.174 267.6)
-
Step 700
700
#3957BB
oklch(49.2% 0.161 267.5)
-
Step 800
800 (this color)
#2F4797
oklch(42.6% 0.134 267.8)
-
Step 900
900
#2A3D79
oklch(37.8% 0.105 267.9)
-
Step 950
950
#182447
oklch(27% 0.067 267.5)
#2F4797 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) | #15529A | 0.033 |
| Deuteranopia (no green cones) | #004895 | 0.032 |
| Tritanopia (no blue cones) | #005A68 | 0.110 |
| Achromatopsia (no color) | #4D4D4D | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4797
#2F4797
oklch(42.6% 0.134 267.8)
- #634B00
#634B00
oklch(42.6% 0.087 87.5)
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 #2F4797, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.022
- Blueberry #464196 ΔE 0.033
- Dusk Blue #26538D ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.044
- Light Navy #155084 ΔE 0.048
- Sapphire #2138AB ΔE 0.053
- Twilight #4E518B ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.060
Use #2F4797 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.