#153A40
Closest named color: Midnight Green (#073B4C). oklch(32.5% 0.043 209.6), rgb(21, 58, 64).
Aa
White text reads best on this color (12.27:1).
About this color
#153A40 is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.043 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.022 away. White text reads best on it, at 12.27:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.71:1 |
| White text | 12.27:1 |
Values
| HEX | #153A40 |
| RGB | rgb(21, 58, 64) |
| HSL | hsl(188, 51%, 17%) |
| OKLCH | oklch(32.5% 0.043 209.6) |
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 #153A40 | 12.27:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #153A40 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #153A40 text on white | 12.27:1 | AAA | Lc 97.8 | Preferred for body text |
| #153A40 text on black | 1.71:1 | 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 900.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CCDDE0
oklch(88.6% 0.019 209.4)
-
Step 300
300
#AAC7CC
oklch(81% 0.032 209.2)
-
Step 400
400
#7BAAB2
oklch(70.7% 0.051 209.1)
-
Step 500
500
#57959F
oklch(63.2% 0.066 208.8)
-
Step 600
600
#397F8A
oklch(55.6% 0.072 209.1)
-
Step 700
700
#2B6B75
oklch(49.1% 0.066 209.2)
-
Step 800
800
#25575F
oklch(42.6% 0.055 209.3)
-
Step 900
900 (this color)
#153A40
oklch(32.5% 0.043 209.6)
-
Step 950
950
#162A2E
oklch(27% 0.027 211.7)
#153A40 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) | #353840 | 0.041 |
| Deuteranopia (no green cones) | #2E3340 | 0.037 |
| Tritanopia (no blue cones) | #003D3C | 0.019 |
| Achromatopsia (no color) | #353535 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #153A40
#153A40
oklch(32.5% 0.043 209.6)
- #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 #153A40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.027
- Gunmetal #293241 ΔE 0.035
- Onyx #343A40 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.051
- Charcoal #264653 ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.059
Use #153A40 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.