#637A06
Closest named color: Olive Green (#677A04). oklch(54.2% 0.129 122), rgb(99, 122, 6).
Aa
White text reads best on this color (4.86:1).
About this color
#637A06 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 54%, its chroma 0.129 and its hue 122°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Olive Green (#677A04), ΔE 0.005 away. White text reads best on it, at 4.86:1.
| Hue family | Yellows |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Olive Green (#677A04) |
| Black text | 4.31:1 |
| White text | 4.86:1 |
Values
| HEX | #637A06 |
| RGB | rgb(99, 122, 6) |
| HSL | hsl(72, 91%, 25%) |
| OKLCH | oklch(54.2% 0.129 122) |
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 #637A06 | 4.86:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #637A06 | 4.31:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #637A06 text on white | 4.86:1 | AA | Lc 73.5 | Content text, not long reading |
| #637A06 text on black | 4.31:1 | AA large text | Lc -28.1 | 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 600.
-
Step 50
50
#F4F6F1
oklch(97% 0.007 124.4)
-
Step 100
100
#E8ECE0
oklch(93.7% 0.017 121.8)
-
Step 200
200
#D5DDC6
oklch(88.5% 0.032 122.7)
-
Step 300
300
#BAC79E
oklch(80.9% 0.057 122)
-
Step 400
400
#97AA67
oklch(70.7% 0.093 121.7)
-
Step 500
500
#7E943B
oklch(63% 0.118 121.6)
-
Step 600
600 (this color)
#637A06
oklch(54.2% 0.129 122)
-
Step 700
700
#566A00
oklch(49% 0.118 121.7)
-
Step 800
800
#465707
oklch(42.7% 0.1 122.1)
-
Step 900
900
#3B4812
oklch(37.8% 0.078 121.9)
-
Step 950
950
#222A0D
oklch(26.9% 0.049 122.6)
#637A06 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) | #827200 | 0.050 |
| Deuteranopia (no green cones) | #7F7117 | 0.051 |
| Tritanopia (no blue cones) | #697367 | 0.109 |
| Achromatopsia (no color) | #717171 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637A06
#637A06
oklch(54.2% 0.129 122)
- #7E5AAD
#7E5AAD
oklch(54.2% 0.13 302.3)
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 #637A06, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Green #677A04 ΔE 0.005
- Murky Green #6C7A0E ΔE 0.014
- Muddy Green #657432 ΔE 0.038
- Swamp #698339 ΔE 0.040
- Military Green #667C3E ΔE 0.040
- Swamp Green #748500 ΔE 0.042
- Browny Green #6F6C0A ΔE 0.044
- Brown Green #706C11 ΔE 0.045
Use #637A06 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.