#1F3738
Closest named color: Gunmetal (#293241). oklch(31.8% 0.03 199.1), rgb(31, 55, 56).
Aa
White text reads best on this color (12.63:1).
About this color
#1F3738 is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.030 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.031 away. White text reads best on it, at 12.63:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.66:1 |
| White text | 12.63:1 |
Values
| HEX | #1F3738 |
| RGB | rgb(31, 55, 56) |
| HSL | hsl(182, 29%, 17%) |
| OKLCH | oklch(31.8% 0.03 199.1) |
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 #1F3738 | 12.63:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #1F3738 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #1F3738 text on white | 12.63:1 | AAA | Lc 98.6 | Preferred for body text |
| #1F3738 text on black | 1.66:1 | Fails | Lc 0.0 | Not readable |
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 950.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CBDDDE
oklch(88.4% 0.019 200.8)
-
Step 300
300
#A7C8C9
oklch(80.9% 0.035 198.7)
-
Step 400
400
#76ACAE
oklch(70.8% 0.057 198.9)
-
Step 500
500
#4F979A
oklch(63.1% 0.072 199)
-
Step 600
600
#2D8185
oklch(55.5% 0.079 199.6)
-
Step 700
700
#1F6D70
oklch(49% 0.073 198.8)
-
Step 800
800
#1C595C
oklch(42.7% 0.061 199.8)
-
Step 900
900
#1E494B
oklch(37.6% 0.047 199.4)
-
Step 950
950 (this color)
#1F3738
oklch(31.8% 0.03 199.1)
#1F3738 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) | #343538 | 0.031 |
| Deuteranopia (no green cones) | #2F3238 | 0.027 |
| Tritanopia (no blue cones) | #143937 | 0.013 |
| Achromatopsia (no color) | #333333 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F3738
#1F3738
oklch(31.8% 0.03 199.1)
- #402C2C
#402C2C
oklch(31.7% 0.03 18.9)
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 #1F3738, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.031
- Onyx #343A40 ΔE 0.036
- Midnight Green #073B4C ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.037
- Space Cadet #2B2D42 ΔE 0.046
- Pakistan Green #283618 ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.059
Use #1F3738 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.