#2F4F87
Closest named color: Dusk Blue (#26538D). oklch(43.2% 0.1 260.8), rgb(47, 79, 135).
Aa
White text reads best on this color (8.11:1).
About this color
#2F4F87 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.100 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.015 away. White text reads best on it, at 8.11:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.58:1 |
| White text | 8.11:1 |
Values
| HEX | #2F4F87 |
| RGB | rgb(47, 79, 135) |
| HSL | hsl(218, 48%, 36%) |
| OKLCH | oklch(43.2% 0.1 260.8) |
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 #2F4F87 | 8.11:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #2F4F87 | 2.58:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #2F4F87 text on white | 8.11:1 | AAA | Lc 87.9 | Fine for body text |
| #2F4F87 text on black | 2.58:1 | Fails | Lc -14.3 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ABC2E7
oklch(80.9% 0.058 259.9)
-
Step 400
400
#7FA1DB
oklch(70.6% 0.094 260.8)
-
Step 500
500
#5F89D2
oklch(63.2% 0.12 260.9)
-
Step 600
600
#4571BF
oklch(55.5% 0.131 261)
-
Step 700
700
#375FA5
oklch(49.2% 0.121 260.8)
-
Step 800
800 (this color)
#2F4F87
oklch(43.2% 0.1 260.8)
-
Step 900
900
#29416B
oklch(37.7% 0.078 260.9)
-
Step 950
950
#18263F
oklch(27% 0.051 261.4)
#2F4F87 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) | #365489 | 0.018 |
| Deuteranopia (no green cones) | #294C86 | 0.012 |
| Tritanopia (no blue cones) | #005C64 | 0.085 |
| Achromatopsia (no color) | #505050 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4F87
#2F4F87
oklch(43.2% 0.1 260.8)
- #694A00
#694A00
oklch(43.2% 0.089 81)
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 #2F4F87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.015
- Light Navy #155084 ΔE 0.022
- Cobalt #1E488F ΔE 0.032
- Deep Sea Blue #015482 ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.041
- Twilight #4E518B ΔE 0.043
- Dusk #4E5481 ΔE 0.046
Use #2F4F87 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.