#31879D
Closest named color: Teal Blue (#01889F). oklch(58.2% 0.087 218.1), rgb(49, 135, 157).
Aa
Black text reads best on this color (5.08:1).
About this color
#31879D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.087 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.016 away. Black text reads best on it, at 5.08:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.08:1 |
| White text | 4.13:1 |
Values
| HEX | #31879D |
| RGB | rgb(49, 135, 157) |
| HSL | hsl(192, 52%, 40%) |
| OKLCH | oklch(58.2% 0.087 218.1) |
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 #31879D | 4.13:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #31879D | 5.08:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #31879D text on white | 4.13:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #31879D text on black | 5.08:1 | AA | Lc -33.5 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE3
oklch(88.5% 0.022 218.6)
-
Step 300
300
#A5C7D2
oklch(80.8% 0.04 219.4)
-
Step 400
400
#73ABBB
oklch(70.8% 0.063 217.7)
-
Step 500
500
#4B95AA
oklch(63.1% 0.08 218.8)
-
Step 600
600 (this color)
#31879D
oklch(58.2% 0.087 218.1)
-
Step 700
700
#186B7F
oklch(49% 0.081 218.4)
-
Step 800
800
#185867
oklch(42.8% 0.067 217)
-
Step 900
900
#1C4854
oklch(37.6% 0.052 218.6)
-
Step 950
950
#122A31
oklch(26.9% 0.033 219.1)
#31879D 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) | #79839E | 0.075 |
| Deuteranopia (no green cones) | #6A789D | 0.067 |
| Tritanopia (no blue cones) | #008F8E | 0.042 |
| Achromatopsia (no color) | #7D7D7D | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31879D
#31879D
oklch(58.2% 0.087 218.1)
- #A76854
#A76854
oklch(58.1% 0.087 38.4)
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 #31879D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.016
- Blue NCS #118AB2 ΔE 0.032
- Cerulean #457B9D ΔE 0.037
- Dark Cyan #008B8B ΔE 0.039
- Stormy Blue #507B9C ΔE 0.041
- Teal Green #0A9396 ΔE 0.042
- Ocean #017B92 ΔE 0.045
- Off Blue #5684AE ΔE 0.046
Use #31879D 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.