#639680
Closest named color: Grey Teal (#5E9B8A). oklch(63% 0.064 165.5), rgb(99, 150, 128).
Aa
Black text reads best on this color (6.20:1).
About this color
#639680 is a medium-light, muted green. In OKLCH its lightness is 63%, its chroma 0.064 and its hue 166°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grey Teal (#5E9B8A), ΔE 0.017 away. Black text reads best on it, at 6.20:1.
| Hue family | Greens |
| Lightness | medium-light (63%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Grey Teal (#5E9B8A) |
| Black text | 6.20:1 |
| White text | 3.38:1 |
Values
| HEX | #639680 |
| RGB | rgb(99, 150, 128) |
| HSL | hsl(154, 20%, 49%) |
| OKLCH | oklch(63% 0.064 165.5) |
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 #639680 | 3.38:1 | AA large text | Lc -66.7 | Content text, not long reading |
| Black text on #639680 | 6.20:1 | AA | Lc 42.8 | Non-text elements, placeholder text |
| #639680 text on white | 3.38:1 | AA large text | Lc 61.3 | Content text, not long reading |
| #639680 text on black | 6.20:1 | AA | Lc -40.4 | 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 500.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5ECE8
oklch(93.7% 0.009 161.3)
-
Step 200
200
#CFDDD6
oklch(88.5% 0.018 164.6)
-
Step 300
300
#AFC7BC
oklch(80.8% 0.03 166.3)
-
Step 400
400
#83AB99
oklch(70.7% 0.051 165.6)
-
Step 500
500 (this color)
#639680
oklch(63% 0.064 165.5)
-
Step 600
600
#498169
oklch(55.7% 0.071 164.6)
-
Step 700
700
#3A6D58
oklch(49.2% 0.065 165.3)
-
Step 800
800
#305848
oklch(42.6% 0.053 166.3)
-
Step 900
900
#2B493C
oklch(37.7% 0.043 165)
-
Step 950
950
#1A2B23
oklch(27.1% 0.027 163.6)
#639680 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) | #948F7F | 0.065 |
| Deuteranopia (no green cones) | #8B8981 | 0.061 |
| Tritanopia (no blue cones) | #579690 | 0.025 |
| Achromatopsia (no color) | #8C8C8C | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #639680
#639680
oklch(63% 0.064 165.5)
- #A67A92
#A67A92
oklch(63% 0.064 345.2)
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 #639680, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Teal #5E9B8A ΔE 0.017
- Dull Teal #5F9E8F ΔE 0.026
- Green Grey #77926F ΔE 0.029
- Slate Green #658D6D ΔE 0.031
- Dusty Teal #4C9085 ΔE 0.033
- Sea #3C9992 ΔE 0.038
- Ocean Green #3D9973 ΔE 0.043
- Persian Green #2A9D8F ΔE 0.044
Use #639680 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.