#637D0D
Closest named color: Olive Green (#677A04). oklch(55% 0.131 123.2), rgb(99, 125, 13).
Aa
White text reads best on this color (4.69:1).
About this color
#637D0D is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 55%, its chroma 0.131 and its hue 123°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Olive Green (#677A04), ΔE 0.009 away. White text reads best on it, at 4.69:1.
| Hue family | Yellows |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Olive Green (#677A04) |
| Black text | 4.46:1 |
| White text | 4.69:1 |
Values
| HEX | #637D0D |
| RGB | rgb(99, 125, 13) |
| HSL | hsl(74, 81%, 27%) |
| OKLCH | oklch(55% 0.131 123.2) |
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 #637D0D | 4.69:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #637D0D | 4.46:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #637D0D text on white | 4.69:1 | AA | Lc 72.5 | Content text, not long reading |
| #637D0D text on black | 4.46:1 | AA large text | Lc -29.2 | 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 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
#D5DDC6
oklch(88.5% 0.032 122.7)
-
Step 300
300
#B9C79E
oklch(80.8% 0.058 123)
-
Step 400
400
#95AB67
oklch(70.8% 0.095 123.4)
-
Step 500
500
#7C953B
oklch(63.1% 0.12 122.9)
-
Step 600
600 (this color)
#637D0D
oklch(55% 0.131 123.2)
-
Step 700
700
#546B00
oklch(49.1% 0.121 123.1)
-
Step 800
800
#455708
oklch(42.6% 0.1 122.8)
-
Step 900
900
#3A4813
oklch(37.7% 0.078 122.9)
-
Step 950
950
#222A0D
oklch(26.9% 0.049 122.6)
#637D0D 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) | #857400 | 0.054 |
| Deuteranopia (no green cones) | #82741B | 0.054 |
| Tritanopia (no blue cones) | #69766A | 0.109 |
| Achromatopsia (no color) | #747474 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637D0D
#637D0D
oklch(55% 0.131 123.2)
- #815CAF
#815CAF
oklch(54.9% 0.13 303)
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 #637D0D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Green #677A04 ΔE 0.009
- Murky Green #6C7A0E ΔE 0.015
- Swamp #698339 ΔE 0.035
- Swamp Green #748500 ΔE 0.035
- Mossy Green #638B27 ΔE 0.040
- Military Green #667C3E ΔE 0.040
- Sap Green #5C8B15 ΔE 0.040
- Muddy Green #657432 ΔE 0.043
Use #637D0D 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.