#2F3B85
Closest named color: Cobalt (#1E488F). oklch(38.6% 0.124 272.3), rgb(47, 59, 133).
Aa
White text reads best on this color (10.07:1).
About this color
#2F3B85 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.124 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.038 away. White text reads best on it, at 10.07:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.08:1 |
| White text | 10.07:1 |
Values
| HEX | #2F3B85 |
| RGB | rgb(47, 59, 133) |
| HSL | hsl(232, 48%, 35%) |
| OKLCH | oklch(38.6% 0.124 272.3) |
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 #2F3B85 | 10.07:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #2F3B85 | 2.08:1 | Fails | Lc 10.9 | Not readable |
| #2F3B85 text on white | 10.07:1 | AAA | Lc 93.1 | Preferred for body text |
| #2F3B85 text on black | 2.08:1 | Fails | Lc -9.4 | 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 900.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CDD8FC
oklch(88.5% 0.051 271.9)
-
Step 300
300
#ACBDFD
oklch(80.9% 0.093 272.7)
-
Step 400
400
#8198FD
oklch(70.6% 0.15 272.4)
-
Step 500
500
#657BFA
oklch(63.1% 0.189 272.4)
-
Step 600
600
#4F60E9
oklch(55.6% 0.206 272.4)
-
Step 700
700
#404ECB
oklch(49.1% 0.192 272.3)
-
Step 800
800
#3441A4
oklch(42.7% 0.159 272.1)
-
Step 900
900 (this color)
#2F3B85
oklch(38.6% 0.124 272.3)
-
Step 950
950
#1A224C
oklch(27.1% 0.078 272.1)
#2F3B85 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) | #084688 | 0.039 |
| Deuteranopia (no green cones) | #003E83 | 0.038 |
| Tritanopia (no blue cones) | #004C5A | 0.104 |
| Achromatopsia (no color) | #424242 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3B85
#2F3B85
oklch(38.6% 0.124 272.3)
- #534200
#534200
oklch(38.6% 0.079 92.2)
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 #2F3B85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.041
- Twilight Blue #0A437A ΔE 0.043
- Blueberry #464196 ΔE 0.048
- Light Navy #155084 ΔE 0.061
- Marine Blue #01386A ΔE 0.065
- Sapphire #2138AB ΔE 0.065
- Dusk Blue #26538D ΔE 0.066
Use #2F3B85 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.