#2F536F
Closest named color: YInMn Blue (#415A77). oklch(42.8% 0.063 243.5), rgb(47, 83, 111).
Aa
White text reads best on this color (8.11:1).
About this color
#2F536F is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.063 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.034 away. White text reads best on it, at 8.11:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.58:1 |
| White text | 8.11:1 |
Values
| HEX | #2F536F |
| RGB | rgb(47, 83, 111) |
| HSL | hsl(206, 41%, 31%) |
| OKLCH | oklch(42.8% 0.063 243.5) |
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 #2F536F | 8.11:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #2F536F | 2.58:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #2F536F text on white | 8.11:1 | AAA | Lc 88.0 | Fine for body text |
| #2F536F text on black | 2.58:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#ADC4D7
oklch(80.9% 0.037 243.1)
-
Step 400
400
#81A5C3
oklch(70.6% 0.059 243.9)
-
Step 500
500
#618FB4
oklch(63.2% 0.075 243.6)
-
Step 600
600
#47799F
oklch(55.7% 0.08 242.8)
-
Step 700
700
#386588
oklch(49% 0.075 243.7)
-
Step 800
800 (this color)
#2F536F
oklch(42.8% 0.063 243.5)
-
Step 900
900
#2A455A
oklch(37.8% 0.049 243)
-
Step 950
950
#192834
oklch(26.9% 0.03 243.3)
#2F536F 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) | #475370 | 0.031 |
| Deuteranopia (no green cones) | #3E4D6E | 0.024 |
| Tritanopia (no blue cones) | #025A5D | 0.052 |
| Achromatopsia (no color) | #505050 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F536F
#2F536F
oklch(42.8% 0.063 243.5)
- #674729
#674729
oklch(42.6% 0.062 63)
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 #2F536F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.042
- Light Navy #155084 ΔE 0.043
- Petrol #005F6A ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.049
- Dusk Blue #26538D ΔE 0.050
- Deep Teal #00555A ΔE 0.051
Use #2F536F 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.