#2F557B
Closest named color: Light Navy Blue (#2E5A88). oklch(43.9% 0.077 250), rgb(47, 85, 123).
Aa
White text reads best on this color (7.75:1).
About this color
#2F557B is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.077 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.023 away. White text reads best on it, at 7.75:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #2F557B |
| RGB | rgb(47, 85, 123) |
| HSL | hsl(210, 45%, 33%) |
| OKLCH | oklch(43.9% 0.077 250) |
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 #2F557B | 7.75:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #2F557B | 2.70:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #2F557B text on white | 7.75:1 | AAA | Lc 86.8 | Fine for body text |
| #2F557B text on black | 2.70:1 | Fails | Lc -15.3 | Dividers and decoration only |
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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CDDBE9
oklch(88.5% 0.025 248.1)
-
Step 300
300
#ABC3DD
oklch(80.8% 0.045 250.5)
-
Step 400
400
#7FA4CC
oklch(70.6% 0.072 250.8)
-
Step 500
500
#5D8EBF
oklch(63.2% 0.091 249.4)
-
Step 600
600
#4277AB
oklch(55.6% 0.099 249.6)
-
Step 700
700
#346493
oklch(49.2% 0.092 249.8)
-
Step 800
800 (this color)
#2F557B
oklch(43.9% 0.077 250)
-
Step 900
900
#284460
oklch(37.8% 0.059 249.6)
-
Step 950
950
#182838
oklch(27.1% 0.037 249.3)
#2F557B 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) | #45577D | 0.028 |
| Deuteranopia (no green cones) | #3B4F7A | 0.021 |
| Tritanopia (no blue cones) | #005E62 | 0.064 |
| Achromatopsia (no color) | #525252 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F557B
#2F557B
oklch(43.9% 0.077 250)
- #6D4A1D
#6D4A1D
oklch(43.9% 0.077 70)
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 #2F557B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.023
- YInMn Blue #415A77 ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.030
- Light Navy #155084 ΔE 0.033
- Dusk Blue #26538D ΔE 0.033
- Dusk #4E5481 ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.043
- Denim #3B638C ΔE 0.050
Use #2F557B 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.