#2F4B97
Closest named color: Cobalt (#1E488F). oklch(43.4% 0.129 266), rgb(47, 75, 151).
Aa
White text reads best on this color (8.15:1).
About this color
#2F4B97 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.129 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.024 away. White text reads best on it, at 8.15:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.57:1 |
| White text | 8.15:1 |
Values
| HEX | #2F4B97 |
| RGB | rgb(47, 75, 151) |
| HSL | hsl(224, 53%, 39%) |
| OKLCH | oklch(43.4% 0.129 266) |
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 #2F4B97 | 8.15:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #2F4B97 | 2.57:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #2F4B97 text on white | 8.15:1 | AAA | Lc 87.9 | Fine for body text |
| #2F4B97 text on black | 2.57:1 | Fails | Lc -14.2 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#AAC0F2
oklch(80.9% 0.075 266.2)
-
Step 400
400
#7D9EEC
oklch(70.7% 0.121 265.9)
-
Step 500
500
#5D84E6
oklch(63.2% 0.154 265.8)
-
Step 600
600
#446BD4
oklch(55.6% 0.167 265.8)
-
Step 700
700
#3659B8
oklch(49.2% 0.156 265.7)
-
Step 800
800 (this color)
#2F4B97
oklch(43.4% 0.129 266)
-
Step 900
900
#283E76
oklch(37.7% 0.1 265.7)
-
Step 950
950
#182545
oklch(27.1% 0.062 265.8)
#2F4B97 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) | #21549A | 0.026 |
| Deuteranopia (no green cones) | #014B95 | 0.031 |
| Tritanopia (no blue cones) | #005D6A | 0.106 |
| Achromatopsia (no color) | #4F4F4F | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4B97
#2F4B97
oklch(43.4% 0.129 266)
- #674C00
#674C00
oklch(43.4% 0.089 85)
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 #2F4B97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.024
- Dusk Blue #26538D ΔE 0.030
- Blueberry #464196 ΔE 0.037
- Light Navy #155084 ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.049
- Twilight #4E518B ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.054
Use #2F4B97 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.