#2F407F
Closest named color: Twilight Blue (#0A437A). oklch(39.2% 0.108 269.5), rgb(47, 64, 127).
Aa
White text reads best on this color (9.71:1).
About this color
#2F407F is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.108 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 9.71:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.16:1 |
| White text | 9.71:1 |
Values
| HEX | #2F407F |
| RGB | rgb(47, 64, 127) |
| HSL | hsl(227, 46%, 34%) |
| OKLCH | oklch(39.2% 0.108 269.5) |
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 #2F407F | 9.71:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #2F407F | 2.16:1 | Fails | Lc 11.6 | Not readable |
| #2F407F text on white | 9.71:1 | AAA | Lc 92.3 | Preferred for body text |
| #2F407F text on black | 2.16:1 | Fails | Lc -10.1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F8
oklch(88.6% 0.045 268.7)
-
Step 300
300
#ACBFF6
oklch(81% 0.081 269.7)
-
Step 400
400
#809CF1
oklch(70.7% 0.129 269.1)
-
Step 500
500
#6280ED
oklch(63.1% 0.167 269.6)
-
Step 600
600
#4B67DB
oklch(55.6% 0.18 269.5)
-
Step 700
700
#3D55BE
oklch(49.2% 0.167 269.6)
-
Step 800
800
#32469A
oklch(42.7% 0.139 269.6)
-
Step 900
900 (this color)
#2F407F
oklch(39.2% 0.108 269.5)
-
Step 950
950
#192348
oklch(26.9% 0.07 269.8)
#2F407F 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) | #204881 | 0.025 |
| Deuteranopia (no green cones) | #12417E | 0.028 |
| Tritanopia (no blue cones) | #004E59 | 0.093 |
| Achromatopsia (no color) | #444444 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F407F
#2F407F
oklch(39.2% 0.108 269.5)
- #574300
#574300
oklch(39.3% 0.08 89.3)
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 #2F407F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Cobalt #1E488F ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.043
- Light Navy #155084 ΔE 0.047
- Blueberry #464196 ΔE 0.052
- Dusk Blue #26538D ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.061
- Marine Blue #01386A ΔE 0.062
Use #2F407F 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.