#255658
Closest named color: Deep Teal (#00555A). oklch(42% 0.053 198.9), rgb(37, 86, 88).
Aa
White text reads best on this color (8.23:1).
About this color
#255658 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.053 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.021 away. White text reads best on it, at 8.23:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.55:1 |
| White text | 8.23:1 |
Values
| HEX | #255658 |
| RGB | rgb(37, 86, 88) |
| HSL | hsl(182, 41%, 25%) |
| OKLCH | oklch(42% 0.053 198.9) |
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 #255658 | 8.23:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #255658 | 2.55:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #255658 text on white | 8.23:1 | AAA | Lc 88.3 | Fine for body text |
| #255658 text on black | 2.55:1 | Fails | Lc -13.9 | 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 800.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CDDDDD
oklch(88.6% 0.017 196.8)
-
Step 300
300
#AAC7C8
oklch(80.9% 0.031 199.1)
-
Step 400
400
#7CAAAC
oklch(70.6% 0.049 199.5)
-
Step 500
500
#599598
oklch(63% 0.063 199.8)
-
Step 600
600
#3C8082
oklch(55.7% 0.069 197.9)
-
Step 700
700
#2D6C6E
oklch(49.1% 0.064 198.1)
-
Step 800
800 (this color)
#255658
oklch(42% 0.053 198.9)
-
Step 900
900
#25484A
oklch(37.6% 0.041 200.4)
-
Step 950
950
#162A2B
oklch(26.9% 0.026 199.8)
#255658 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) | #505258 | 0.054 |
| Deuteranopia (no green cones) | #484C58 | 0.050 |
| Tritanopia (no blue cones) | #005956 | 0.021 |
| Achromatopsia (no color) | #4F4F4F | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255658
#255658
oklch(42% 0.053 198.9)
- #674142
#674142
oklch(42% 0.053 17.8)
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 #255658, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.021
- Dark Slate Gray #2F4F4F ΔE 0.023
- Petrol #005F6A ΔE 0.035
- Dark Blue Green #005249 ΔE 0.037
- Dark Teal #014D4E ΔE 0.041
- Dark Green Blue #1F6357 ΔE 0.043
- Charcoal #264653 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.054
Use #255658 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.