#315B79
Closest named color: YInMn Blue (#415A77). oklch(45.4% 0.068 241.5), rgb(49, 91, 121).
Aa
White text reads best on this color (7.23:1).
About this color
#315B79 is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.068 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.018 away. White text reads best on it, at 7.23:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.90:1 |
| White text | 7.23:1 |
Values
| HEX | #315B79 |
| RGB | rgb(49, 91, 121) |
| HSL | hsl(205, 42%, 33%) |
| OKLCH | oklch(45.4% 0.068 241.5) |
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 #315B79 | 7.23:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #315B79 | 2.90:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #315B79 text on white | 7.23:1 | AAA | Lc 85.0 | Fine for body text |
| #315B79 text on black | 2.90:1 | Fails | Lc -17.0 | 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
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#ABC4D8
oklch(80.8% 0.039 242.2)
-
Step 400
400
#7DA6C5
oklch(70.7% 0.064 241.4)
-
Step 500
500
#5B90B7
oklch(63.2% 0.082 241.6)
-
Step 600
600
#3F79A2
oklch(55.5% 0.088 241.6)
-
Step 700
700
#31668B
oklch(49.1% 0.082 241.6)
-
Step 800
800 (this color)
#315B79
oklch(45.4% 0.068 241.5)
-
Step 900
900
#26455B
oklch(37.7% 0.053 241)
-
Step 950
950
#172935
oklch(27.1% 0.033 238.8)
#315B79 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) | #4E5B7A | 0.036 |
| Deuteranopia (no green cones) | #445478 | 0.028 |
| Tritanopia (no blue cones) | #006265 | 0.054 |
| Achromatopsia (no color) | #575757 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315B79
#315B79
oklch(45.4% 0.068 241.5)
- #724D2D
#724D2D
oklch(45.4% 0.068 60.6)
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 #315B79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.018
- Light Navy Blue #2E5A88 ΔE 0.026
- Denim #3B638C ΔE 0.038
- Petrol #005F6A ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.044
- Dusty Grape #545775 ΔE 0.044
- Dusk #4E5481 ΔE 0.044
Use #315B79 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.