#2F517B
Closest named color: Light Navy (#155084). oklch(43% 0.081 254.6), rgb(47, 81, 123).
Aa
White text reads best on this color (8.12:1).
About this color
#2F517B is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.081 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.026 away. White text reads best on it, at 8.12:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.58:1 |
| White text | 8.12:1 |
Values
| HEX | #2F517B |
| RGB | rgb(47, 81, 123) |
| HSL | hsl(213, 45%, 33%) |
| OKLCH | oklch(43% 0.081 254.6) |
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 #2F517B | 8.12:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #2F517B | 2.58:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #2F517B text on white | 8.12:1 | AAA | Lc 88.0 | Fine for body text |
| #2F517B 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#ACC3DF
oklch(80.9% 0.047 253.5)
-
Step 400
400
#80A3CF
oklch(70.6% 0.076 254.4)
-
Step 500
500
#608CC3
oklch(63.1% 0.097 254.5)
-
Step 600
600
#4675AF
oklch(55.5% 0.105 254.5)
-
Step 700
700
#376297
oklch(49.1% 0.098 254.6)
-
Step 800
800 (this color)
#2F517B
oklch(43% 0.081 254.6)
-
Step 900
900
#294362
oklch(37.7% 0.062 253.6)
-
Step 950
950
#19273A
oklch(27% 0.041 256.3)
#2F517B 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) | #3F547D | 0.023 |
| Deuteranopia (no green cones) | #354C7A | 0.015 |
| Tritanopia (no blue cones) | #005B60 | 0.069 |
| Achromatopsia (no color) | #4F4F4F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F517B
#2F517B
oklch(43% 0.081 254.6)
- #694813
#694813
oklch(42.8% 0.08 74.6)
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 #2F517B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.029
- Dusk Blue #26538D ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.031
- YInMn Blue #415A77 ΔE 0.039
- Dusk #4E5481 ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.048
- Cobalt #1E488F ΔE 0.050
Use #2F517B 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.