#51978A
Closest named color: Sea (#3C9992). oklch(62.7% 0.074 180.3), rgb(81, 151, 138).
Aa
Black text reads best on this color (6.14:1).
About this color
#51978A is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.074 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.018 away. Black text reads best on it, at 6.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.14:1 |
| White text | 3.41:1 |
Values
| HEX | #51978A |
| RGB | rgb(81, 151, 138) |
| HSL | hsl(169, 30%, 45%) |
| OKLCH | oklch(62.7% 0.074 180.3) |
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 #51978A | 3.41:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #51978A | 6.14:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #51978A text on white | 3.41:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #51978A text on black | 6.14:1 | AA | Lc -40.1 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDEDA
oklch(88.6% 0.02 181.1)
-
Step 300
300
#A8C9C1
oklch(80.9% 0.037 179)
-
Step 400
400
#78ADA2
oklch(70.7% 0.058 180.2)
-
Step 500
500 (this color)
#51978A
oklch(62.7% 0.074 180.3)
-
Step 600
600
#338375
oklch(55.7% 0.081 179.7)
-
Step 700
700
#246E62
oklch(48.9% 0.075 180.3)
-
Step 800
800
#205A50
oklch(42.7% 0.062 179.9)
-
Step 900
900
#214A43
oklch(37.7% 0.048 181)
-
Step 950
950
#142B27
oklch(26.9% 0.03 181.4)
#51978A 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) | #92908A | 0.079 |
| Deuteranopia (no green cones) | #86878B | 0.075 |
| Tritanopia (no blue cones) | #349993 | 0.022 |
| Achromatopsia (no color) | #8B8B8B | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51978A
#51978A
oklch(62.7% 0.074 180.3)
- #AE7586
#AE7586
oklch(62.6% 0.075 0)
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 #51978A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.018
- Grey Teal #5E9B8A ΔE 0.019
- Dusty Teal #4C9085 ΔE 0.022
- Dull Teal #5F9E8F ΔE 0.026
- Persian Green #2A9D8F ΔE 0.028
- Blue Green #0F9B8E ΔE 0.034
- Cadet Blue #5F9EA0 ΔE 0.039
- Ocean Green #3D9973 ΔE 0.042
Use #51978A 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.