#51988E
Closest named color: Sea (#3C9992). oklch(63% 0.074 183.8), rgb(81, 152, 142).
Aa
Black text reads best on this color (6.23:1).
About this color
#51988E is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.074 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.016 away. Black text reads best on it, at 6.23:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.23:1 |
| White text | 3.36:1 |
Values
| HEX | #51988E |
| RGB | rgb(81, 152, 142) |
| HSL | hsl(172, 30%, 46%) |
| OKLCH | oklch(63% 0.074 183.8) |
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 #51988E | 3.36:1 | AA large text | Lc -66.5 | Content text, not long reading |
| Black text on #51988E | 6.23:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #51988E text on white | 3.36:1 | AA large text | Lc 61.0 | Content text, not long reading |
| #51988E text on black | 6.23:1 | AA | Lc -40.7 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CBDEDA
oklch(88.5% 0.021 181.8)
-
Step 300
300
#A8C9C3
oklch(81% 0.036 183.2)
-
Step 400
400
#77ADA4
oklch(70.7% 0.058 183.1)
-
Step 500
500 (this color)
#51988E
oklch(63% 0.074 183.8)
-
Step 600
600
#318378
oklch(55.7% 0.081 183)
-
Step 700
700
#226E65
oklch(49% 0.074 183.9)
-
Step 800
800
#1F5A53
oklch(42.7% 0.062 184.4)
-
Step 900
900
#204A44
oklch(37.7% 0.048 183.2)
-
Step 950
950
#142B28
oklch(26.9% 0.03 184.8)
#51988E 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) | #92918E | 0.078 |
| Deuteranopia (no green cones) | #86888F | 0.074 |
| Tritanopia (no blue cones) | #319B95 | 0.023 |
| Achromatopsia (no color) | #8C8C8C | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51988E
#51988E
oklch(63% 0.074 183.8)
- #B07784
#B07784
oklch(63.2% 0.073 4.4)
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 #51988E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.016
- Grey Teal #5E9B8A ΔE 0.018
- Dull Teal #5F9E8F ΔE 0.024
- Dusty Teal #4C9085 ΔE 0.025
- Persian Green #2A9D8F ΔE 0.028
- Cadet Blue #5F9EA0 ΔE 0.034
- Blue Green #0F9B8E ΔE 0.035
- Teal Green #0A9396 ΔE 0.044
Use #51988E 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.