#31617E
Closest named color: YInMn Blue (#415A77). oklch(47.2% 0.07 237.3), rgb(49, 97, 126).
Aa
White text reads best on this color (6.68:1).
About this color
#31617E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.070 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.025 away. White text reads best on it, at 6.68:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 3.14:1 |
| White text | 6.68:1 |
Values
| HEX | #31617E |
| RGB | rgb(49, 97, 126) |
| HSL | hsl(203, 44%, 34%) |
| OKLCH | oklch(47.2% 0.07 237.3) |
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 #31617E | 6.68:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #31617E | 3.14:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #31617E text on white | 6.68:1 | AA | Lc 82.8 | Fine for body text |
| #31617E text on black | 3.14:1 | AA large text | Lc -19.1 | 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 700.
-
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
#CEDBE4
oklch(88.4% 0.019 237.8)
-
Step 300
300
#ADC4D4
oklch(80.8% 0.034 238.3)
-
Step 400
400
#81A6BF
oklch(70.7% 0.055 238.1)
-
Step 500
500
#6090AF
oklch(63.1% 0.07 237.7)
-
Step 600
600
#457A9A
oklch(55.6% 0.075 236.8)
-
Step 700
700 (this color)
#31617E
oklch(47.2% 0.07 237.3)
-
Step 800
800
#2E546B
oklch(42.8% 0.058 236.8)
-
Step 900
900
#294557
oklch(37.6% 0.046 237.9)
-
Step 950
950
#192933
oklch(27.1% 0.028 236.7)
#31617E 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) | #54607F | 0.042 |
| Deuteranopia (no green cones) | #49597E | 0.034 |
| Tritanopia (no blue cones) | #00686B | 0.051 |
| Achromatopsia (no color) | #5C5C5C | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31617E
#31617E
oklch(47.2% 0.07 237.3)
- #795132
#795132
oklch(47.2% 0.07 57.8)
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 #31617E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.025
- Denim #3B638C ΔE 0.026
- Light Navy Blue #2E5A88 ΔE 0.031
- Peacock Blue #016795 ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.043
- Slate #516572 ΔE 0.045
- Petrol #005F6A ΔE 0.046
- Dusky Blue #475F94 ΔE 0.047
Use #31617E 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.