#2F4787
Closest named color: Cobalt (#1E488F). oklch(41.4% 0.111 266.2), rgb(47, 71, 135).
Aa
White text reads best on this color (8.85:1).
About this color
#2F4787 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.111 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 8.85:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #2F4787 |
| RGB | rgb(47, 71, 135) |
| HSL | hsl(224, 48%, 36%) |
| OKLCH | oklch(41.4% 0.111 266.2) |
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 #2F4787 | 8.85:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #2F4787 | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #2F4787 text on white | 8.85:1 | AAA | Lc 90.0 | Preferred for body text |
| #2F4787 text on black | 2.37:1 | Fails | Lc -12.2 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#ADC0EB
oklch(80.8% 0.065 266.3)
-
Step 400
400
#829FE2
oklch(70.7% 0.104 265.9)
-
Step 500
500
#6485D9
oklch(63% 0.132 266.5)
-
Step 600
600
#4C6EC7
oklch(55.7% 0.143 266.1)
-
Step 700
700
#3D5BAC
oklch(49.1% 0.134 266.3)
-
Step 800
800 (this color)
#2F4787
oklch(41.4% 0.111 266.2)
-
Step 900
900
#2C3F6F
oklch(37.7% 0.086 266.1)
-
Step 950
950
#1A2541
oklch(27% 0.055 266.6)
#2F4787 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) | #284E89 | 0.020 |
| Deuteranopia (no green cones) | #194686 | 0.022 |
| Tritanopia (no blue cones) | #005660 | 0.095 |
| Achromatopsia (no color) | #4A4A4A | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4787
#2F4787
oklch(41.4% 0.111 266.2)
- #604700
#604700
oklch(41.4% 0.085 85.5)
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 #2F4787, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Light Navy #155084 ΔE 0.033
- Dusk Blue #26538D ΔE 0.034
- Twilight Blue #0A437A ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.043
- Blueberry #464196 ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.047
- Twilight #4E518B ΔE 0.055
Use #2F4787 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.