#133A3F
Closest named color: Midnight Green (#073B4C). oklch(32.3% 0.044 206.9), rgb(19, 58, 63).
Aa
White text reads best on this color (12.31:1).
About this color
#133A3F is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.044 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.023 away. White text reads best on it, at 12.31:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.70:1 |
| White text | 12.31:1 |
Values
| HEX | #133A3F |
| RGB | rgb(19, 58, 63) |
| HSL | hsl(187, 54%, 16%) |
| OKLCH | oklch(32.3% 0.044 206.9) |
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 #133A3F | 12.31:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #133A3F | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #133A3F text on white | 12.31:1 | AAA | Lc 97.9 | Preferred for body text |
| #133A3F text on black | 1.70:1 | 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
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DFEDEF
oklch(93.6% 0.015 207.1)
-
Step 200
200
#C4DFE3
oklch(88.5% 0.029 207.4)
-
Step 300
300
#9ACBD2
oklch(81% 0.052 207.1)
-
Step 400
400
#5BB0BB
oklch(70.8% 0.084 206.5)
-
Step 500
500
#0B9BAA
oklch(63.1% 0.107 207.1)
-
Step 600
600
#00838F
oklch(55.7% 0.095 206.1)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#005A63
oklch(42.7% 0.073 206.6)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950 (this color)
#133A3F
oklch(32.3% 0.044 206.9)
#133A3F 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) | #35383F | 0.043 |
| Deuteranopia (no green cones) | #2E333F | 0.038 |
| Tritanopia (no blue cones) | #003D3B | 0.018 |
| Achromatopsia (no color) | #353535 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133A3F
#133A3F
oklch(32.3% 0.044 206.9)
- #482B27
#482B27
oklch(32.4% 0.044 28.3)
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 #133A3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.029
- Gunmetal #293241 ΔE 0.037
- Onyx #343A40 ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.052
- Charcoal #264653 ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.060
Use #133A3F 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.