#638017
Closest named color: Olive Green (#677A04). oklch(55.8% 0.13 124.6), rgb(99, 128, 23).
Aa
Black text reads best on this color (4.63:1).
About this color
#638017 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 56%, its chroma 0.130 and its hue 125°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Olive Green (#677A04), ΔE 0.017 away. Black text reads best on it, at 4.63:1.
| Hue family | Yellows |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Olive Green (#677A04) |
| Black text | 4.63:1 |
| White text | 4.53:1 |
Values
| HEX | #638017 |
| RGB | rgb(99, 128, 23) |
| HSL | hsl(77, 70%, 30%) |
| OKLCH | oklch(55.8% 0.13 124.6) |
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 #638017 | 4.53:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #638017 | 4.63:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #638017 text on white | 4.53:1 | AA | Lc 71.3 | Content text, not long reading |
| #638017 text on black | 4.63:1 | AA | Lc -30.3 | 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
#F4F6F1
oklch(97% 0.007 124.4)
-
Step 100
100
#E7ECE0
oklch(93.6% 0.017 125.3)
-
Step 200
200
#D4DDC6
oklch(88.4% 0.032 124.5)
-
Step 300
300
#B8C89E
oklch(81% 0.06 124.7)
-
Step 400
400
#94AB69
oklch(70.8% 0.094 124.4)
-
Step 500
500
#79963E
oklch(63.2% 0.12 125)
-
Step 600
600 (this color)
#638017
oklch(55.8% 0.13 124.6)
-
Step 700
700
#526C04
oklch(49.2% 0.121 124.6)
-
Step 800
800
#43580C
oklch(42.8% 0.1 124.7)
-
Step 900
900
#384814
oklch(37.6% 0.078 124.7)
-
Step 950
950
#212A0D
oklch(26.8% 0.049 124.1)
#638017 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) | #887700 | 0.057 |
| Deuteranopia (no green cones) | #847622 | 0.058 |
| Tritanopia (no blue cones) | #68796D | 0.108 |
| Achromatopsia (no color) | #767676 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638017
#638017
oklch(55.8% 0.13 124.6)
- #855EB1
#855EB1
oklch(55.8% 0.13 304.2)
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 #638017, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Green #677A04 ΔE 0.017
- Murky Green #6C7A0E ΔE 0.019
- Swamp #698339 ΔE 0.029
- Swamp Green #748500 ΔE 0.029
- Mossy Green #638B27 ΔE 0.031
- Sap Green #5C8B15 ΔE 0.033
- Moss Green #658B38 ΔE 0.036
- Khaki Green #728639 ΔE 0.039
Use #638017 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.